The Complete Water Analysis Guide: How to Choose the Right Water Treatment Solution

Why Every Drop of Water Tells a Story

Imagine filling a glass with water that looks crystal clear. It has no unusual smell, no strange color, and no visible particles floating inside it. At first glance, most people would assume the water is perfectly safe to drink.

However, appearances can be deceiving.

Some of the world’s cleanest-looking water contains dissolved minerals, bacteria, viruses, heavy metals, agricultural chemicals, or naturally occurring contaminants that you cannot see, smell, or taste. On the other hand, water with a slight color or odor may simply contain naturally occurring minerals that require relatively straightforward treatment.

This is why professionals never judge water quality by appearance alone.

Instead, they rely on a water analysis to understand exactly what the water contains. A professional analysis removes the guesswork by identifying the physical, chemical, and microbiological characteristics of your water. Once these results are known, it becomes possible to recommend a treatment solution that addresses the actual problem instead of making costly assumptions.

Whether you rely on municipal water, borehole water, rainwater harvesting, river water, or another source, understanding your water is the first step toward producing clean, reliable, high-quality drinking water.

Throughout this guide, you’ll learn how water testing works, what each laboratory result means, and why every reading influences the type of treatment system you should install. You’ll also discover real-world examples that demonstrate how professionals interpret water analysis reports and design practical treatment solutions.

By the end of this guide, you’ll understand why investing in a professional water analysis is one of the smartest decisions you can make before purchasing any water treatment equipment.

Why Clear Water Can Still Be Unsafe

One of the biggest misconceptions about drinking water is that if it looks clean, it must be safe.

Unfortunately, that assumption can lead to expensive mistakes and, in some cases, serious health risks.

Many contaminants are completely invisible. They dissolve into the water or exist as microscopic organisms that cannot be detected without proper testing.

For example, water can appear clear while containing the following:

• High levels of dissolved salts.
• Excessive nitrates from agricultural runoff.
• Harmful bacteria such as Escherichia coli (E. coli).
• Elevated iron or manganese.
• Heavy metals such as lead or arsenic.
• High fluoride concentrations.
• Dissolved organic compounds.
• Pesticide residues.

Likewise, cloudy or slightly colored water does not always indicate that it is unsafe. In many cases, naturally occurring minerals such as iron or manganese affect the appearance without presenting the same level of health concern as microbiological contamination. Nevertheless, those minerals can still stain fixtures, damage appliances, and reduce the performance of treatment systems.

This is why laboratory testing is so important. Rather than relying on assumptions, it provides measurable data that helps identify both visible and invisible water quality issues.

Why Every Water Source Is Different

No two water sources are exactly alike.

Even neighboring properties can have dramatically different water quality because geology, infrastructure, land use, rainfall, and groundwater movement all influence water chemistry.

Consider these examples:

Municipal Water

Municipal water is generally treated before it reaches homes and businesses. However, water quality may still vary depending on the source, the distribution network, seasonal conditions, and the age of the infrastructure.

Some municipal supplies have:

• Elevated chlorine levels.
• Moderate hardness.
• Higher Total Dissolved Solids (TDS).
• Taste or odor concerns.

Borehole Water

Borehole water often contains naturally occurring minerals that dissolve as groundwater passes through underground rock formations.

Depending on the location, a borehole may contain the following:

• High iron.
• High manganese.
• Elevated hardness.
• Low pH.
• High conductivity.
• Increased salinity.
• Nitrates.

Because these characteristics differ from one borehole to another, two properties only a short distance apart may require completely different treatment systems.

Rainwater

Many people assume rainwater is pure because it falls from the sky.

In reality, rainwater absorbs atmospheric gases before reaching the ground. It can also collect contaminants from roofs, gutters, storage tanks, and surrounding environments.

Consequently, harvested rainwater may require filtration, disinfection, and pH correction before it is suitable for drinking.

Surface Water

Water from rivers, dams, and lakes changes continuously.

Heavy rainfall, agricultural runoff, industrial activities, and seasonal changes can all influence water quality.

As a result, treatment systems for surface water often require several stages, including clarification, filtration, activated carbon, and disinfection.

Why Guessing Can Cost You Thousands

Many people purchase water treatment equipment before understanding what is actually in their water.

Although this approach seems faster, it often leads to disappointing results and unnecessary expense.

Consider these common scenarios.

Scenario 1: Buying a Water Softener Instead of Reverse Osmosis

A homeowner notices white scale inside the kettle.

Assuming hardness is the only problem, they install a water softener.

Several months later, they discover the water still tastes salty because the actual issue was high dissolved solids rather than hardness alone.

As a result, they now need an additional reverse osmosis system.

Scenario 2: Installing a UV System Without Proper Filtration

Another homeowner wants protection against bacteria.

They install a UV sterilizer without first checking turbidity.

Unfortunately, suspended particles block the ultraviolet light, reducing disinfection effectiveness.

Although the UV unit operates correctly, the untreated turbidity prevents reliable microbial control.

Scenario 3: Choosing the Wrong Reverse Osmosis System

A business installs a reverse osmosis system based only on daily water demand.

However, the supplier never reviews the feed water chemistry.

Because the water contains high hardness and elevated silica, the membranes foul rapidly.

Within months, cleaning frequency increases, production decreases, and membrane replacement becomes necessary.

A professional water analysis could have identified these risks before installation, allowing the system to include the correct pretreatment and operate more efficiently.

What Is a Water Analysis?

A water analysis is a scientific evaluation of a water sample performed using specialized laboratory equipment and recognized testing methods.

Instead of relying on appearance, taste, or smell, the analysis measures the physical, chemical, and microbiological characteristics of the water.

Each result provides valuable information about how the water behaves, whether it meets drinking water guidelines, and which treatment technologies are most appropriate.

When combined, these measurements create a complete picture of your water quality. That information allows water treatment professionals to design solutions that target the actual causes of poor water quality rather than simply treating the symptoms.

In the next section, we’ll examine each category of testing in detail and explain how the results influence the design of an effective water treatment system.

The Three Pillars of Water Analysis: Physical, Chemical, and Microbiological Testing

A complete water analysis is not based on one single measurement.

Many people assume that testing water means checking whether it is clear, measuring pH, or using a handheld TDS meter. While these tests can provide useful information, they only reveal part of the overall picture.

Water is a complex combination of minerals, gases, microorganisms, and dissolved substances. Understanding its quality requires examining three major categories:

1. Physical characteristics
2. Chemical characteristics
3. Microbiological characteristics

Each category answers different questions:

• What does the water look like?
• What substances are dissolved in the water?
• Is the water biologically safe?

Only by combining all three can a water treatment professional determine the correct solution.

1. Physical Water Analysis: Understanding What You Can See

Physical testing focuses on characteristics that can often be observed directly.

These measurements provide the first indication of potential water quality issues and help determine what type of treatment may be required.

Common physical parameters include:

• Colour
• Odour
• Taste
• Temperature
• Turbidity
• Suspended solids

Although these characteristics may seem simple, they provide important clues about what is happening inside the water.

Colour: What Does the Appearance of Water Tell You?

Colour is one of the first things people notice about their water.

Nobody wants to drink brown, yellow, or cloudy water. However, colour alone does not always indicate whether water is unsafe.

Water colour can come from several sources, including:

Natural minerals

Iron and manganese are two of the most common causes of coloured water.

Iron can create:

• Orange or reddish staining.
• Metallic taste.
• Brown marks on sinks, toilets, and laundry.

Manganese can create:

• Black staining.
• Dark deposits.
• Unpleasant taste.

These minerals are especially common in borehole water throughout South Africa.

Organic material

Water from rivers, dams, or poorly maintained storage tanks may contain organic compounds from:

• Leaves.
• Soil.
• Vegetation.
• Decaying plant matter.

This can create a tea-like colour and may increase the demand on filtration systems.

Plumbing corrosion

Older plumbing systems may release:

• Rust particles.
• Copper.
• Other metals.

This can affect both colour and taste.

Example: Brown Water From a Borehole

A homeowner installs a borehole and notices that their water turns orange after standing in a bucket.

A water analysis shows:

Iron: 5 mg/L
Manganese: 0.2 mg/L
pH: 6.1

Although the water may not contain dangerous bacteria, the elevated iron causes staining and unpleasant taste.

A suitable treatment approach may include:

• Oxidation.
• Iron removal filtration.
• pH correction.

Why?

Iron removal media works more effectively when iron is converted into a form that can be physically filtered. Low pH water can also reduce treatment performance and increase corrosion risk.

Important note: This example is illustrative only. Actual treatment recommendations depend on the complete water analysis and intended use.

Turbidity: Measuring Water Clarity

Turbidity refers to the cloudiness of water caused by suspended particles.

These particles may include:

• Sand.
• Clay.
• Silt.
• Organic matter.
• Microorganisms.
• Fine mineral particles.

Turbidity is measured in NTU (Nephelometric Turbidity Units).

The higher the NTU value, the more particles are suspended in the water.

Why Turbidity Matters

Many people assume cloudy water is only a cosmetic problem.

However, turbidity can affect treatment performance.

For example:

Reverse Osmosis

Suspended solids can:

• Block sediment filters.
• Reduce membrane life.
• Increase maintenance requirements.

UV Sterilisation

UV systems require clear water because microorganisms must receive sufficient ultraviolet exposure.

If particles are present, bacteria may hide behind them, reducing disinfection effectiveness.

Example:

Water analysis:

Turbidity: 18 NTU
E. coli: Present

A homeowner installs UV only.

The UV light works correctly, but the cloudy water prevents reliable microorganism exposure.

A better treatment design may include:

1. Sediment filtration.
2. Multimedia filtration.
3. UV sterilization.

The filtration removes particles first, allowing the UV system to disinfect more effectively.

Temperature: The Hidden Influence on Water Treatment

Water temperature is often overlooked, but it affects several treatment processes.

Temperature influences:

• Chemical reactions.
• Membrane performance.
• Dissolved oxygen levels.
• Microbial growth.

For example:

Reverse Osmosis Systems

RO membrane production decreases as water temperature drops.

A system producing a certain amount of water during summer may produce less during colder winter months.

This is important when selecting an RO system for:

• Water shops.
• Commercial facilities.
• Industrial applications.

Odour and Taste: What Your Senses Reveal

Taste and smell can indicate potential water quality issues.

Common causes include:

Chlorine Taste

Usually associated with municipal water treatment.

Although chlorine is intentionally added for disinfection, excessive levels may cause:

• Strong taste.
• Swimming pool smell.
• Dry skin sensation.

Common treatment:

Activated carbon filtration

Activated carbon removes chlorine and improves taste.

Rotten Egg Smell

Usually caused by:

Hydrogen sulphide gas

Common in some borehole sources.

Treatment may include:

• Aeration.
• Oxidation.
• Specialized filtration media.

Metallic Taste

Possible causes:

• Iron.
• Copper.
• Low pH corrosion.
• High mineral content.

Treatment depends on the actual cause identified through analysis.

2. Chemical Water Analysis: Understanding What Is Dissolved

Chemical testing is one of the most important parts of water analysis because many contaminants cannot be seen.

A glass of perfectly clear water may contain the following:

• Excess minerals.
• Metals.
• Salts.
• Nutrients.
• Chemicals.

Chemical analysis reveals what is dissolved inside the water.

Important chemical parameters include:

• pH.
• Total Dissolved Solids (TDS).
• Conductivity.
• Hardness.
• Alkalinity.
• Iron.
• Manganese.
• Nitrates.
• Sulphates.
• Chlorides.
• Fluoride.
• Sodium.
• Silica.
• Heavy metals.

Each one tells part of the water’s story.

3. Microbiological Water Analysis: Is the Water Biologically Safe?

Chemical quality is only one part of safe drinking water.

Water may have excellent chemical results but still contain harmful microorganisms.

Microbiological testing checks for organisms such as

• Escherichia coli (E. coli).
• Total coliform bacteria.
• Other indicator organisms.

These organisms help determine whether contamination from sources such as

• Sewage.
• Animal waste.
• Poor sanitation.
• Surface runoff.

may be affecting the water.

Why E. coli Testing Matters

E. coli is commonly used as an indicator organism because its presence suggests possible contamination from faecal sources.

Potential sources include the following:

• Damaged borehole seals.
• Poorly constructed wells.
• Contaminated storage tanks.
• Flooding.

Treatment options may include:

• UV sterilization.
• Chlorination.
• Ozone treatment.
• Improved filtration.

However, the correct solution depends on the source of contamination.

For example:

A UV system can disinfect water entering a home, but it cannot correct a leaking borehole that continuously introduces contamination.

Why Professional Interpretation Matters

A water analysis report contains numbers.

But numbers alone do not create solutions.

The skill lies in understanding relationships between different readings.

For example:

A pH reading of 6.0 may not immediately tell the whole story.

But when combined with:

• High iron.
• Low alkalinity.
• High carbon dioxide.

it may indicate aggressive water that could corrode plumbing.

Likewise:

High TDS does not automatically mean unsafe water.

The actual minerals contributing to the TDS determine the correct treatment approach.

This is why professional interpretation is essential.

The Next Step: Understanding Every Water Quality Reading

Now that we understand the three foundations of water analysis, the next section will examine the individual parameters in detail.

We will explain:

• What each measurement means.
• Typical acceptable ranges.
• Problems caused by abnormal readings.
• Treatment technologies used.
• Real-world examples.

This is where a water analysis report changes from a confusing laboratory document into a practical roadmap for producing high-quality drinking water.

Understanding Every Water Quality Reading: What Your Water Analysis Report Really Means

Receiving a water analysis report for the first time can feel overwhelming.

A laboratory report may contain dozens of measurements, unfamiliar abbreviations, and numerical values that seem impossible to interpret.

You may see terms such as:

• pH
• TDS
• Conductivity
• NTU
• Hardness
• Alkalinity
• SDI
• Nitrate
• Sulphate
• Coliforms

But what do these readings actually mean?

More importantly:

How do these numbers determine which water treatment system you need?

This is where professional interpretation becomes valuable.

A water analysis report is not simply a list of numbers. It is a detailed picture of how your water behaves, what problems may exist, and which treatment technologies will solve those problems.

A single reading rarely tells the complete story.

For example:

• High TDS does not automatically mean unsafe water.
• Low pH does not automatically mean acidic water requires the same treatment everywhere.
• Iron removal systems may fail if pH conditions are not suitable.
• UV sterilization may not work correctly if turbidity is too high.

Every parameter must be understood together with the others.

Important note: The treatment examples provided in this guide are for educational purposes only. Every water source is unique, and Puritech recommends a professional water analysis before selecting any treatment system.

Understanding pH in Water

What Is pH?

pH measures how acidic or alkaline water is.

The pH scale ranges from

0 – 14

Where:

• pH below 7 = acidic water
• pH of 7 = neutral water
• pH above 7 = alkaline water

The pH of drinking water is one of the most important measurements because it affects:

• Taste.
• Plumbing.
• Corrosion.
• Scaling.
• Treatment effectiveness.

Low pH Water (Acidic Water)

Water with a low pH can become aggressive and corrosive.

This is particularly common with borehole water because groundwater can absorb carbon dioxide from soil and rock formations.

Problems caused by low pH:

1. Corrosion of plumbing

Acidic water can attack metal pipes and fittings.

Possible results:

• Blue-green staining from copper.
• Metallic taste.
• Increased metal levels.
• Reduced plumbing lifespan.

2. Increased iron problems

Low pH can keep iron dissolved in water, making it harder to remove.

A homeowner may see:

• Orange stains.
• Brown water.
• Metallic taste.

3. Reduced treatment efficiency

Many filtration media perform best within specific pH ranges.

Example:

Water analysis:

pH: 5.4
Iron: 6 mg/L
TDS: 320 mg/L

Symptoms:

• Brown staining.
• Metallic taste.
• Corroded taps.

Possible treatment approach:

1. pH correction system

A calcite neutralizer may be used to increase alkalinity and raise pH.

2. Iron removal filtration

Once conditions are improved, iron removal media can work more effectively.

3. Final polishing filtration

Activated carbon may improve taste and odor.

Why?

Treating iron without correcting the acidic conditions may result in poor performance and repeated maintenance.

High pH Water (Alkaline Water)

High pH water is less common as a problem than low pH water, but it can still create challenges.

Possible effects include:

• Bitter taste.
• Soap-like feeling.
• Reduced effectiveness of chlorine disinfection.
• Scaling potential.

High pH is often associated with:

• Mineral-rich groundwater.
• Certain geological formations.

Treatment depends on the cause.

Possible solutions:

• Acid dosing.
• Reverse osmosis.
• Blending with another source.

Total Dissolved Solids (TDS)

What Is TDS?

Total dissolved solids measure the amount of dissolved substances in water.

These substances may include:

• Calcium.
• Magnesium.
• Sodium.
• Chlorides.
• Sulfates.
• Minerals.
• Salts.

TDS is measured in

mg/L (milligrams per litre)
or
ppm (parts per million)

The measurement tells us how much dissolved material is present.

Is High TDS Dangerous?

Not necessarily.

This is one of the biggest misconceptions in water treatment.

A high TDS reading does not automatically mean the water is unsafe.

For example:

Mineral-rich water may have a higher TDS but still be acceptable for drinking.

However, high TDS can affect:

• Taste.
• Appliance performance.
• Scaling.
• Reverse osmosis requirements.

Common Effects of High TDS

Taste Problems

High dissolved minerals may create:

• Salty taste.
• Bitter taste.
• Metallic taste.

Scaling

Minerals can deposit inside:

• Kettles.
• Geysers.
• Coffee machines.
• Pipes.

Reverse Osmosis Performance

High TDS increases the workload on RO membranes.

This can lead to:

• Reduced production.
• Higher rejection pressure.
• More frequent maintenance.

Example:

Water analysis:

TDS: 1,500 mg/L
Conductivity: 2,400 µS/cm
Hardness: High

Symptoms:

• White scale on appliances.
• Unpleasant taste.
• Poor quality drinking water.

Possible treatment:

Pretreatment filtration

Removes suspended contaminants and protects equipment.

Water softening

Reduces hardness minerals.

Reverse osmosis system

Reduces dissolved salts and improves drinking quality.

Why?

A softener removes hardness, but it does not remove all dissolved solids.

If the problem is high mineral content, RO may be required.

Conductivity

What Is Conductivity?

Conductivity measures how easily water conducts electrical current.

The ability to conduct electricity increases as dissolved minerals increase.

Conductivity is commonly measured in:

µS/cm (microsiemens per centimetre)

It is closely related to TDS.

Higher conductivity usually indicates:

• More dissolved ions.
• Higher mineral content.

Why Conductivity Matters

Conductivity helps professionals understand:

• Mineral concentration.
• Salinity.
• RO system requirements.
• Industrial water suitability.

It is especially important for:

• Boiler applications.
• Manufacturing.
• Laboratories.
• Food processing.

Example:

Water analysis:

Conductivity: 3,500 µS/cm

This suggests significant dissolved mineral content.

Possible concerns:

• High scaling risk.
• Poor taste.
• Reduced suitability for sensitive industrial applications.

Possible treatment:

• Reverse osmosis.
• Demineralisation.
• Specialist industrial treatment.

Turbidity

What Is Turbidity?

Turbidity measures suspended particles in water.

It is measured in:

NTU (Nephelometric Turbidity Units)

These particles may include:

• Clay.
• Sand.
• Organic matter.
• Microorganisms.
• Rust particles.

Why Turbidity Is Important

High turbidity can:

• Affect appearance.
• Block filters.
• Reduce UV effectiveness.
• Damage RO membranes.

Example:

Water analysis:

Turbidity: 12 NTU
Bacteria: Present

Recommended treatment:

Stage 1: Sediment filtration

Removes larger particles.

Stage 2: Multimedia filtration

Reduces finer suspended solids.

Stage 3: UV sterilisation

Provides microbial protection.

Why?

Disinfection works best when water is clear enough for UV light to penetrate.

Iron in Water

Why Is Iron a Common Problem?

Iron is one of the most common groundwater problems in South Africa.

It naturally occurs as groundwater dissolves minerals from underground rock formations.

Problems Caused by Iron

Even low levels can cause:

• Orange stains.
• Brown laundry marks.
• Metallic taste.
• Blocked pipes.
• Deposits in appliances.

Example:

Water analysis:

Iron: 4 mg/L

Symptoms:

• Orange toilet stains.
• Brown marks around taps.
• Metallic taste.

Possible treatment:

Oxidation

Converts dissolved iron into particles.

Iron removal filter

Captures the oxidized iron.

pH correction

Improves removal efficiency when required.

Manganese

What Is Manganese?

Manganese is another naturally occurring mineral commonly found in borehole water.

Problems Caused by Manganese

It can cause:

• Black stains.
• Dark deposits.
• Unpleasant taste.
• Appliance fouling.

Manganese is often more difficult to remove than iron.

Example:

Water analysis:

Manganese: 0.5 mg/L
Iron: 2 mg/L

Possible treatment:

• Oxidation.
• Catalytic filtration media.
• pH adjustment.

Water Hardness

What Is Hard Water?

Hardness refers mainly to calcium and magnesium dissolved in water.

Signs of Hard Water

Common signs include:

• White scale deposits.
• Soap not producing foam easily.
• Blocked shower heads.
• Reduced geyser efficiency.

Example:

Water analysis:

Hardness: 350 mg/L

Symptoms:

• Scale inside kettle.
• White deposits on bathroom surfaces.

Possible treatment:

Water softener

Uses ion exchange resin to reduce calcium and magnesium.

Why?

A softener targets hardness minerals specifically.

However, it does not remove:

• Bacteria.
• Nitrates.
• Most dissolved salts.

Why One Reading Is Never Enough

Consider these two water sources:

Water Source A

TDS: 800 mg/L
Hardness: Low

Water Source B

TDS: 800 mg/L
Hardness: Very High

Both have identical TDS.

But the treatment may be completely different.

Source A may require the following:

• RO for taste improvement.

Source B may require the following:

• Softening before RO.

This demonstrates why professional interpretation matters.

Understanding More Water Quality Parameters: The Hidden Factors That Determine the Right Treatment Solution

In Part 3, we explored some of the most common water quality measurements, including pH, TDS, conductivity, turbidity, iron, manganese, and hardness.

However, a complete water analysis goes much deeper.

Many water treatment mistakes happen because only the obvious problems are addressed.

For example:

• Removing hardness while ignoring high nitrates.
• Installing reverse osmosis without checking silica.
• Using UV sterilization without addressing contamination sources.
• Treating taste problems while ignoring corrosive water conditions.

A professional water analysis looks at the complete picture.

The following parameters often determine whether a water treatment system will perform effectively, operate efficiently, and provide consistently high-quality drinking water.

Alkalinity: Understanding Water’s Natural Buffering Ability

What Is Alkalinity?

Alkalinity measures water’s ability to resist changes in pH.

In simple terms, it tells us how well water can maintain its chemical balance.

The main contributors to alkalinity are:

• Bicarbonates.
• Carbonates.
• Hydroxides.

Alkalinity is usually measured in:

mg/L as Calcium Carbonate (CaCO₃)

Why Alkalinity Matters

Alkalinity plays an important role in:

• pH stability.
• Corrosion control.
• Water treatment efficiency.

Water with very low alkalinity may experience unstable pH and increased corrosion potential.

Water with high alkalinity may contribute to:

• Scaling.
• High pH conditions.
• Reduced effectiveness of certain treatments.

Example:

Water analysis:

pH: 5.8
Alkalinity: 15 mg/L

The water may appear acceptable, but the low alkalinity means it has little ability to resist acidity.

Possible concerns:

• Corrosion of copper pipes.
• Metallic taste.
• Increased iron problems.

Possible treatment:

• Calcite filtration.
• Alkalinity correction.

Why?

Increasing alkalinity helps stabilize the water and protect plumbing systems.

Nitrates: A Critical Drinking Water Parameter

What Are Nitrates?

Nitrates are nitrogen compounds that occur naturally in the environment.

However, elevated nitrate levels are commonly associated with:

• Agricultural fertilizers.
• Animal waste.
• Septic systems.
• Poorly protected boreholes.

Nitrates are especially important when evaluating drinking water.

Why High Nitrates Matter

The greatest concern is

• Infants.
• Pregnant women.
• Vulnerable individuals.

High nitrate exposure can interfere with the body’s ability to transport oxygen in the blood.

This is why nitrate testing is especially important for the following:

• Borehole water.
• Rural properties.
• Farms.
• Schools.
• Guest lodges.

Example:

Water analysis:

Nitrate: 80 mg/L

Possible source:

Agricultural runoff entering groundwater.

Possible treatment:

Reverse osmosis

RO membranes can significantly reduce nitrate levels.

Nitrate-selective ion exchange

Specialised resin can target nitrates.

Why?

Standard carbon filters and sediment filters do not remove dissolved nitrates.

Sulphates: Taste and Water Quality Concerns

What Are Sulphates?

Sulphates are naturally occurring minerals found in groundwater.

They may originate from:

• Rock formations.
• Soil.
• Industrial activities.

Effects of High Sulphates

High sulphates can cause:

• Bitter taste.
• Mineral taste.
• Digestive discomfort at very high levels.

They can also contribute to:

• Scaling.
• Increased dissolved solids.

Example:

Water analysis:

Sulphate: 600 mg/L
TDS: 1,200 mg/L

Possible treatment:

• Reverse osmosis.

Why?

RO reduces dissolved sulphate ions and improves taste.

Chlorides: The Salt Indicator

What Are Chlorides?

Chlorides are salts dissolved in water.

They are naturally present but become problematic when concentrations increase.

Sources include:

• Saline groundwater.
• Coastal areas.
• Industrial discharge.
• Road salts.

Problems Caused by High Chlorides

High chloride levels may cause:

• Salty taste.
• Corrosion.
• Damage to metal plumbing.
• Reduced suitability for industrial use.

Example:

Water analysis:

Chloride: 450 mg/L

Symptoms:

• Salty taste.
• Corrosion on plumbing fixtures.

Possible treatment:

Reverse osmosis

Removes dissolved chloride salts.

Blending

Combining water sources may reduce concentration.

Fluoride: Understanding Both Low and High Levels

What Is Fluoride?

Fluoride occurs naturally in groundwater and is also added to some municipal water supplies in certain countries.

Fluoride is an interesting parameter because both insufficient and excessive levels can be a concern.

Low Fluoride

Very low fluoride levels may provide less dental protection.

High Fluoride

Elevated fluoride can cause:

• Dental fluorosis.
• Long-term health concerns at high exposure levels.

High fluoride is often associated with certain geological regions.

Example:

Water analysis:

Fluoride: 3 mg/L

Possible treatment:

• Reverse osmosis.
• Activated alumina filtration.
• Specialized fluoride removal media.

Why?

Standard sediment and carbon filters do not remove fluoride effectively.

Sodium: More Than Just Salt Taste

What Is Sodium in Water?

Sodium is a naturally occurring mineral.

It can enter water through the following:

• Geological sources.
• Salt deposits.
• Water treatment processes.
• Industrial activities.

Effects of High Sodium

High sodium can contribute to the following:

• Salty taste.
• Increased TDS.
• Concerns for individuals requiring sodium-controlled diets.

Example:

Water analysis:

Sodium: 250 mg/L
TDS: 1,800 mg/L

Possible treatment:

• Reverse osmosis.

Why?

RO reduces sodium and improves overall mineral balance.

Silica: The Hidden Challenge in Reverse Osmosis Systems

What Is Silica?

Silica is a naturally occurring compound found in groundwater.

Although it is not usually a major drinking water concern, it is extremely important in industrial applications.

Why Silica Matters

Silica can create problems in:

• Boilers.
• Cooling systems.
• Industrial RO plants.
• High-purity water applications.

It can form difficult deposits that are challenging to remove.

Example:

Industrial water analysis:

Silica: 80 mg/L
TDS: Moderate

Possible treatment:

• Reverse osmosis.
• Double-pass RO.
• Specialized polishing systems.

Why?

Silica behavior differs from many other dissolved minerals and requires careful system design.

Silt Density Index (SDI): Protecting Reverse Osmosis Membranes

What Is SDI?

The Silt Density Index measures how likely water is to foul an RO membrane.

It evaluates the amount of suspended material that can block filtration surfaces.

SDI is especially important for:

• Commercial RO systems.
• Industrial RO systems.
• High-volume water treatment plants.

Why SDI Matters

High SDI can cause:

• Reduced RO production.
• Increased pressure.
• Membrane fouling.
• Higher operating costs.

Example:

Before installing a commercial RO system:

Water analysis:

SDI: 8

This indicates excessive fouling potential.

Possible treatment:

• Multimedia filtration.
• Cartridge filtration.
• Additional pretreatment stages.

Why?

Protecting the RO membrane improves efficiency and extends operating life.

Heavy Metals: Invisible Contaminants That Require Specialist Testing

Heavy metals are among the most important contaminants to identify because they cannot be detected by appearance, smell, or taste.

Common heavy metals include:

• Lead.
• Arsenic.
• Mercury.
• Copper.
• Chromium.

Lead

Possible sources:

• Old plumbing.
• Industrial contamination.

Concerns:

• Particularly important for children.
• Can accumulate over time.

Treatment:

• Reverse osmosis.
• Specialised adsorption media.

Arsenic

Possible sources:

• Natural geological deposits.
• Mining areas.

Treatment:

• Specialized arsenic removal media.
• Reverse osmosis.

Mercury

Possible sources:

• Industrial contamination.
• Mining activities.

Treatment:

• Specialist filtration technologies.

Microbiological Testing: The Biological Side of Water Quality

Chemical quality alone does not guarantee safe drinking water.

Water can have excellent mineral readings and still contain harmful microorganisms.

Microbiological analysis checks for:

• Total coliform bacteria.
• Escherichia coli (E. coli).
• Other indicator organisms.

Total Coliforms

Coliform bacteria are used as indicators of possible contamination.

Their presence may suggest the following:

• Poor sanitation.
• Storage tank contamination.
• Surface water entering groundwater.

E. coli

E. coli is especially important because it indicates possible faecal contamination.

Potential sources:

• Animal waste.
• Sewage contamination.
• Poor borehole construction.

Example:

Water analysis:

E. coli: Detected
Turbidity: 10 NTU

Possible treatment:

1. Remove turbidity.
2. Install UV sterilization.
3. Investigate contamination source.

Why?

Disinfection treats microorganisms, but it does not solve the reason contamination entered the water.

Viruses and Advanced Microbial Protection

Some applications require additional protection against smaller microorganisms.

These may include:

• Healthcare facilities.
• Laboratories.
• Food processing.
• Pharmaceutical applications.

Possible technologies:

• UV.
• Ultrafiltration.
• Reverse osmosis.
• Ozone.

The correct choice depends on the application and required water quality standard.

Why Water Parameters Must Be Viewed Together

A common mistake is focusing on one reading.

Water treatment is a system design process.

For example:

Case A

High iron only:

Solution:

Iron removal filtration.

Case B

High iron + low pH:

Solution:

pH correction first, then iron removal.

Case C

High TDS + high hardness + silica:

Solution:

Pretreatment plus reverse osmosis.

Case D

Bacteria + turbidity:

Solution:

Filtration first, then disinfection.

The relationship between parameters determines the correct treatment approach.

Real Water Analysis Examples and Recommended Treatment Solutions

Understanding individual water quality parameters is important, but the true value of a water analysis comes from understanding how those readings work together.

A professional water treatment design does not focus on one number in isolation.

Instead, specialists examine the complete water profile:

• What contaminants are present?
• At what concentration?
• What is causing the problem?
• What treatment technology will remove it?
• How will the system continue performing over time?

The examples below demonstrate how water analysis results are interpreted and translated into practical treatment solutions.

Important note: The examples below are realistic educational scenarios designed to demonstrate the interpretation process. They are not universal treatment recommendations. Every water source is unique, and the correct solution depends on a complete water analysis, intended application, required water quality, and operating conditions.

Example 1: Borehole Water With Low pH, Iron, and Manganese

Customer Situation

A homeowner installs a borehole and notices the following:

• Orange stains around bathroom fixtures.
• Brown marks on laundry.
• Metallic taste.
• Corrosion on taps.
• Unpleasant-looking water after standing.

The water appears clear when first drawn but changes colour after exposure to air.

Water Analysis Results

Understanding the Results

At first glance, the TDS appears acceptable.

Many homeowners may assume:

“The water is clear and the TDS is not high, so the water must be fine.”

However, the analysis reveals several issues.

Problem 1: Low pH

A pH of 5.3 indicates acidic water.

Potential effects:

• Corrosion of plumbing.
• Metallic taste.
• Increased metal dissolution.
• Reduced filtration efficiency.

Problem 2: High Iron

Iron at 8 mg/L is significantly elevated.

Likely symptoms:

• Orange staining.
• Brown water.
• Metallic taste.

Iron can also damage plumbing fixtures and appliances over time.

Problem 3: Elevated Manganese

Manganese contributes to:

• Black staining.
• Dark deposits.
• Taste problems.

Manganese removal is often more difficult than iron removal and requires appropriate treatment media.

Recommended Treatment Approach

A possible treatment train:

Stage 1: pH Correction

Technology: Calcite neutraliser

Purpose:

• Increase pH.
• Improve water stability.
• Reduce corrosion potential.

Why first?

Because many iron removal systems perform better when pH conditions are suitable.

Stage 2: Iron and Manganese Removal

Technology: Oxidation + catalytic filtration media

Purpose:

• Convert dissolved iron and manganese.
• Capture the resulting particles.

Stage 3: Final Polishing Filtration

Technology: Activated carbon

Purpose:

• Improve taste.
• Remove residual odors.
• Provide better drinking water quality.

Final Outcome

The homeowner receives:

• Clearer water.
• Reduced staining.
• Better taste.
• Protected plumbing.
• Longer appliance life.

The important lesson:

The iron problem was not solved by simply installing an iron filter. The low pH also needed attention because water chemistry determines treatment performance.

Example 2: High TDS Borehole Water Requiring Reverse Osmosis

Customer Situation

A small water business wants to produce bottled-quality drinking water from a borehole.

The owner notices:

• Salty taste.
• Mineral deposits.
• Customers complain about inconsistent taste.

Water Analysis Results

Understanding the Results

This water has a high dissolved mineral content.

The problem is not visible dirt.

The issue is dissolved substances.

A sediment filter alone will not solve this.

Why?

Sediment filters remove particles.

They do not remove dissolved salts.

Recommended Treatment Approach

Stage 1: Sediment Filtration

Purpose:

• Protect downstream equipment.
• Remove fine particles.

Stage 2: Water Softening

Purpose:

• Reduce hardness minerals.

Why?

High hardness increases scaling potential.

Without softening, RO membranes may foul faster.

Stage 3: Activated Carbon Filtration

Purpose:

• Remove chlorine if present.
• Improve taste.
• Protect membranes.

Stage 4: Reverse Osmosis System

Purpose:

• Reduce dissolved salts.
• Improve taste.
• Produce high-quality drinking water.

Stage 5: Remineralisation (Optional)

Some applications may benefit from adding selected minerals back after RO treatment.

Why?

Reverse osmosis removes many dissolved substances, producing very low mineral water.

Final Outcome

The customer receives:

• Improved taste.
• Reduced mineral content.
• Better consistency.
• Longer RO membrane lifespan.

The important lesson:

High TDS is not solved with ordinary filtration. When dissolved minerals are the problem, membrane technology such as reverse osmosis is often required.

Example 3: Bacterial Contamination in Borehole Water

Customer Situation

A rural property uses borehole water.

The owner experiences:

• Occasional stomach problems among residents.
• Cloudy water after rainfall.
• Concern about drinking safety.

Water Analysis Results

Understanding the Results

The mineral quality is acceptable.

The concern is microbiological safety.

However, there is an additional challenge:

The water contains high turbidity.

Why UV Alone Is Not Enough

Many people immediately think:

“Install a UV system.”

However, UV requires clear water.

Suspended particles can shield microorganisms from UV exposure.

Therefore, filtration must come first.

Recommended Treatment Approach

Stage 1: Sediment Filtration

Removes:

• Sand.
• Dirt.
• Suspended particles.

Stage 2: Multimedia Filtration

Reduces:

• Fine suspended solids.
• Turbidity.

Stage 3: UV Sterilisation

Provides:

• Microbiological protection.
• Reduction of bacteria and microorganisms.

Additional Recommendation

The contamination source should also be investigated.

Possible causes:

• Poor borehole sealing.
• Nearby septic systems.
• Surface water entering the borehole.

Treatment protects the user, but fixing the contamination source provides long-term improvement.

Example 4: Complete Borehole Treatment System

Customer Situation

A farm requires drinking water for:

• Family use.
• Workers.
• Animals.
• Guest accommodation.

The borehole produces water with multiple issues.

Water Analysis Results

Understanding the Challenge

This water has several categories of problems:

Physical:

• Turbidity.

Chemical:

• Low pH.
• Iron.
• Manganese.
• Hardness.
• Elevated TDS.

Microbiological:

• Bacteria.

A single filter cannot solve this.

Possible Treatment Train

Stage 1: Pre-filtration

Removes larger particles.

Stage 2: pH Correction

Improves stability and prepares water chemistry.

Stage 3: Iron and Manganese Removal

Targets staining and taste problems.

Stage 4: Water Softener

Reduces hardness.

Protects:

• Geysers.
• Pipes.
• Appliances.

Stage 5: Activated Carbon

Improves taste and removes organic compounds.

Stage 6: UV Sterilisation

Provides final microbiological protection.

Stage 7: Drinking Water RO System (If Required)

For premium drinking water:

• Reduce dissolved minerals.
• Improve taste.
• Provide purified drinking water.

Why This Example Matters

Many customers ask:

“Which filter should I buy?”

But the better question is:

“What does my water need?”

The correct solution is designed from the analysis backwards.

Example 5: Commercial Water Shop Application

Customer Situation

A business wants to start selling purified drinking water.

The goal:

Produce consistent, high-quality drinking water while keeping operating costs controlled.

Water Analysis

Treatment Considerations

Although the water looks acceptable, it may still require preparation before RO.

Recommended System Design

Carbon Filtration

Removes chlorine.

Why?

Chlorine can damage RO membranes.

Softening

Reduces hardness.

Why?

Protects membranes from scaling.

Reverse Osmosis

Produces:

• Improved taste.
• Reduced dissolved solids.
• Consistent product quality.

UV Sterilisation

Provides additional microbial protection.

The Main Lesson From These Examples

Every water problem has a cause.

The solution is not:

“Buy the biggest filter.”

The solution is:

“Understand the water, then design the treatment.”

A properly designed water treatment system:

• Solves the actual problem.
• Protects equipment.
• Reduces maintenance.
• Improves water quality.
• Provides long-term value.

Why Guessing Costs More Than Water Analysis: The Hidden Cost of Choosing the Wrong Water Treatment System

When people experience a water problem, the natural reaction is to search for a quick solution.

They may search online:

• “Best water filter for borehole water.”
• “How to remove iron from water.”
• “How to reduce TDS.”
• “Best home water purifier.”

The challenge is that water problems are not always caused by what appears obvious.

A brown stain does not always mean the same thing.

A bad taste does not always have the same cause.

A high TDS reading does not always require the same solution.

Installing water treatment equipment without understanding the water chemistry is similar to taking medication without knowing the illness.

Sometimes it may help.

Sometimes it may do nothing.

And sometimes it may create new problems.

A professional water analysis removes uncertainty and ensures that the treatment system is designed around the actual characteristics of your water.

The Most Common Mistake: Treating Symptoms Instead of the Cause

One of the biggest mistakes customers make is treating what they can see rather than identifying the reason behind it.

For example:

A homeowner sees white deposits around taps and inside a kettle.

They assume:

“The water is hard.”

They buy a water softener.

However, after installation, the water still tastes unpleasant.

Why?

Because the actual problem was not only hardness.

The water also contained:

• High dissolved salts.
• Elevated sodium.
• High conductivity.

The softener solved one part of the problem but not the complete water quality issue.

A water analysis would have revealed this before money was spent.

Mistake 1: Buying a Water Softener When You Actually Need Reverse Osmosis

The Situation

A customer notices:

• Scale in appliances.
• White marks on bathroom surfaces.
• Poor soap performance.

They immediately purchase a softener.

The Problem

A water softener removes hardness minerals.

• Calcium.
• Magnesium.

However, it does not remove:

• Nitrates.
• Chlorides.
• Sulphates.
• Sodium.
• Most dissolved minerals.

If the real problem is high TDS or salinity, the customer may still experience:

• Poor taste.
• High conductivity.
• Dissolved mineral concerns.

Example:

Water Analysis:

The TDS is high, but hardness is moderate.

A softener may have limited impact.

A reverse osmosis system would be more appropriate because the issue is dissolved solids rather than hardness.

Mistake 2: Installing UV Without Correct Filtration

The Situation

A customer tests their borehole water and discovers bacteria.

They purchase a UV steriliser.

The Problem

UV is an excellent disinfection technology.

However, UV does not remove:

• Sand.
• Dirt.
• Turbidity.
• Dissolved chemicals.

If water is cloudy, microorganisms may be protected by suspended particles.

Example:

Water Analysis:

Installing UV alone is not a complete solution.

A better approach:

1. Sediment filtration.
2. Turbidity reduction.
3. UV sterilization.

Mistake 3: Installing Activated Carbon for the Wrong Problem

Activated carbon is one of the most useful filtration technologies available.

It can improve:

• Taste.
• Odour.
• Chlorine removal.
• Organic compound reduction.

However, it does not remove everything.

Activated carbon is not designed to remove:

• High TDS.
• Hardness.
• Most dissolved salts.
• Nitrates.

Example:

Customer complaint:

“The water tastes salty.”

They install carbon filtration.

Result:

The taste remains.

Why?

The problem was dissolved salts, not chlorine or organic compounds.

The correct technology may have been reverse osmosis.

Mistake 4: Choosing an RO System Based Only on Water Demand

This is especially common in:

• Water shops.
• Businesses.
• Industrial applications.

A customer calculates:

“I need 5,000 liters per day, so I need a 5,000-liter-per-day RO system.”

Unfortunately, this ignores the most important factor:

The quality of the incoming water.

Why Feedwater Chemistry Matters

Two systems producing the same amount of water may require completely different designs.

Consider:

Water Source A

TDS:
300 mg/L

Hardness:
Low

Silica:
Low

Water Source B

TDS:
1,800 mg/L

Hardness:
High

Silica:
High

Both require the same production volume.

However, Source B may require:

• Additional filtration.
• Softening.
• Antiscalant dosing.
• Higher pressure operation.
• Different membrane selection.

Without proper design, the system may experience the following:

• Poor production.
• High energy consumption.
• Frequent cleaning.
• Premature membrane replacement.

Mistake 5: Ignoring pH Before Installing Treatment

pH affects almost every part of water treatment.

It influences:

• Corrosion.
• Scaling.
• Iron removal.
• Disinfection.
• Membrane performance.

Example:

A customer installs an iron filter.

The system works initially but soon loses performance.

Water analysis shows:

pH: 5.5

The iron filter was not necessarily faulty.

The water chemistry was unsuitable.

The solution:

Correct the pH first, then optimise iron removal.

Mistake 6: Buying the Cheapest System Instead of the Correct System

Price is important.

However, the cheapest initial purchase is not always the lowest-cost option.

A poorly designed system may result in:

• Frequent cartridge replacements.
• Higher electricity costs.
• Membrane failures.
• Poor water quality.
• Customer dissatisfaction.

Example:

System A:

Purchase price:
Lower

Maintenance:
High

Performance:
Poor

System B:

Purchase price:
Higher

Maintenance:
Lower

Performance:
Consistent

Over several years, System B may actually cost less because it was designed correctly from the beginning.

The Hidden Cost of Wrong Treatment Decisions

Choosing the wrong system can lead to:

1. Wasted Investment

Money spent on equipment that does not solve the problem.

2. Increased Maintenance

Filters and membranes may fail faster.

3. Poor Water Quality

The customer continues experiencing:

• Bad taste.
• Staining.
• Scale.
• Safety concerns.

4. Equipment Damage

Incorrect treatment can damage:

• Pumps.
• Pipes.
• Appliances.
• RO membranes.

Why Professional Water Analysis Saves Money

A proper water analysis provides:

Confidence

You know what is actually in your water.

Accuracy

The system is designed for your specific conditions.

Protection

Equipment is protected from avoidable damage.

Better Results

The final water quality matches the intended purpose.

Water Treatment Should Follow a Simple Process

The correct approach is:

Step 1: Test the Water

A representative sample is collected and analysed.

↓

Step 2: Understand the Results

The readings are interpreted together.

↓

Step 3: Identify the Problems

Physical, chemical, and microbiological issues are identified.

↓

Step 4: Design the Treatment System

The correct technologies are selected.

↓

Step 5: Install and Maintain

The system is commissioned and monitored.

A Simple Question Can Prevent Expensive Mistakes

Before purchasing any water treatment system, ask:

“Do I know exactly what is wrong with my water?”

If the answer is no, the first step should not be buying equipment.

The first step should be understanding the water.

The Puritech Approach: Water Treatment Designed Around Your Water

At Puritech, the goal is not simply to sell filtration equipment.

The goal is to provide a solution that matches:

• Your water source.
• Your water quality challenges.
• Your required application.
• Your performance expectations.

Every successful treatment system starts with accurate information.

Because the best water treatment system is not the biggest one.

It is the one designed correctly for your water.

How Puritech Designs the Correct Water Treatment Solution: From Water Analysis to Pure, Reliable Water

Choosing a water treatment system should never begin with a product.

It should begin with understanding the water.

One of the biggest reasons water treatment systems fail is because equipment is selected before the water quality challenges are properly identified.

A filter, softener, UV system, or reverse osmosis unit is not a universal solution. Each technology is designed to solve specific problems.

A successful water treatment system is created by following a structured process:

Water Sample → Laboratory Analysis → Expert Interpretation → System Design → Installation → Maintenance

This approach ensures that every component of the system has a purpose and contributes toward producing safe, reliable, high-quality water.

Step 1: Collecting a Representative Water Sample

The first step is obtaining a water sample that accurately represents the water source.

This sounds simple, but incorrect sampling can affect test results.

A poor sample may create misleading information and result in an incorrectly designed treatment system.

Why Proper Sampling Matters

Water quality can change depending on:

• Where the sample is taken.
• How the sample container is prepared.
• Whether the sample represents normal operating conditions.
• Whether the water source has been recently disturbed.

For example:

A borehole that has been unused for several months may produce different results compared to a borehole operating daily.

Likewise:

A sample taken before a storage tank may differ from water collected after the tank.

Different Water Sources Require Different Considerations

Municipal Water

Testing may identify:

• Chlorine levels.
• Hardness.
• TDS.
• Taste issues.
• Pipe-related contamination.

Borehole Water

Testing is especially important because groundwater chemistry varies significantly.

Possible concerns:

• Iron.
• Manganese.
• Low pH.
• Hardness.
• Nitrates.
• Bacteria.
• Salinity.

Rainwater

Important considerations include:

• Roof contamination.
• Storage conditions.
• Microbiological quality.
• pH.

Surface Water

Often requires evaluation of:

• Turbidity.
• Organic matter.
• Microorganisms.
• Seasonal changes.

Step 2: Laboratory Water Analysis

Once the sample is collected, it is analyzed to determine the complete water profile.

A professional water analysis may include:

Physical Testing

Examining:

• Color.
• Odour.
• Turbidity.
• Suspended solids.

Chemical Testing

Measuring:

• pH.
• TDS.
• Conductivity.
• Hardness.
• Iron.
• Manganese.
• Nitrates.
• Sulphates.
• Chlorides.
• Fluoride.
• Sodium.
• Silica.
• Heavy metals.

Microbiological Testing

Checking for:

• E. coli.
• Total coliform bacteria.
• Other indicator organisms.

Why Testing More Than One Parameter Matters

Water quality is interconnected.

A single reading rarely provides the complete answer.

For example:

A customer may report the following:

“My borehole water has orange stains.”

The obvious assumption:

“Install an iron filter.”

However, the analysis may reveal the following:

• High iron.
• Low pH.
• Low alkalinity.

The actual solution may require:

1. pH correction.
2. Iron removal.
3. Final polishing filtration.

Without the complete analysis, the system may not perform correctly.

Step 3: Professional Interpretation of Results

A laboratory report provides information.

A water treatment specialist turns that information into a solution.

This step is where experience becomes essential.

Understanding the Customer’s Actual Needs

The same water source may require different treatment depending on the application.

For example:

Drinking Water

Priorities may include:

• Taste.
• Safety.
• Microbiological protection.
• Reduced contaminants.

Household Water

Priorities may include:

• Protecting appliances.
• Preventing scale.
• Improving bathing and cleaning water.

Water Shop

Priorities may include:

• Consistent production.
• Customer expectations.
• Operating costs.
• Membrane protection.

Industrial Applications

Priorities may include:

• Specific water chemistry requirements.
• Process protection.
• High reliability.

Step 4: Designing the Correct Treatment System

Once the water analysis has been interpreted, the treatment system can be designed.

This is where individual components are selected based on their purpose.

A complete treatment system may include several technologies working together.

Sediment Filtration

Purpose:

Remove suspended particles such as:

• Sand.
• Dirt.
• Rust.
• Silt.

Used to protect:

• Pumps.
• Valves.
• Membranes.
• UV systems.

Activated Carbon Filtration

Purpose:

Improve:

• Taste.
• Odour.
• Chlorine removal.

Common applications:

• Municipal water.
• Drinking water systems.
• RO pretreatment.

Water Softening

Purpose:

Reduce hardness minerals:

• Calcium.
• Magnesium.

Benefits:

• Less scale.
• Better appliance performance.
• Protection of heating systems.

Iron and Manganese Removal

Purpose:

Remove minerals responsible for:

• Orange stains.
• Black stains.
• Metallic taste.

Often requires:

• Correct pH.
• Oxidation.
• Suitable filtration media.

Reverse Osmosis

Purpose:

Reduce dissolved contaminants.

RO is commonly used for:

• Drinking water purification.
• Water shops.
• Commercial applications.

It can reduce:

• Dissolved salts.
• Nitrates.
• Fluoride.
• Many dissolved impurities.

UV Sterilisation

Purpose:

Provide microbiological protection.

UV is effective against many microorganisms when

• Water is clear.
• The system is correctly sized.
• Maintenance is performed.

Step 5: Installation and Commissioning

A correctly designed system still requires proper installation.

Installation affects:

• Performance.
• Reliability.
• Maintenance requirements.

Important considerations include:

• Correct flow rates.
• Pressure requirements.
• Correct pipe sizing.
• Equipment positioning.
• Drain requirements.
• Electrical requirements.

Why Commissioning Matters

After installation, the system should be checked to confirm the following:

• Correct operation.
• Proper flow.
• Correct pressure.
• Expected water quality.

This ensures the system performs as designed.

Step 6: Maintenance and Long-Term Performance

A water treatment system is not a “fit and forget” appliance.

Like any equipment, it requires maintenance.

Maintenance may include:

• Filter replacement.
• Membrane cleaning.
• Media servicing.
• UV lamp replacement.
• Water quality monitoring.

Why Maintenance Is Important

A well-maintained system:

• Performs better.
• Produces consistent water quality.
• Lasts longer.
• Reduces unexpected failures.

The Puritech Difference: Solutions, Not Just Equipment

A common misunderstanding is that water treatment is simply about purchasing a filter.

In reality, successful water treatment combines the following:

Science

Understanding water chemistry.

Engineering

Designing equipment correctly.

Experience

Knowing how different water problems behave.

Service

Maintaining performance over time.

From Problem Water to Quality Water

Every water source has a story.

Some water contains too many minerals.

Some contain unwanted metals.

Some have microbiological risks.

Some simply need refinement to improve taste and quality.

The purpose of a professional water analysis is to reveal that story.

Once the water is understood, the correct solution becomes clear.

Before Investing in Water Treatment, Understand Your Water First

A water treatment system is an investment in:

• Health.
• Convenience.
• Equipment protection.
• Long-term water security.

The best place to begin is not choosing a filter.

It is understanding what is inside your water.

A professional water analysis gives you the information needed to make the right decision.

Common Water Problems and Their Solutions: Understanding What Your Water Is Trying to Tell You

Most people do not think about water quality until something goes wrong.

They notice:

• Brown stains on bathroom fixtures.
• White deposits on taps.
• Strange tastes or smells.
• Cloudy water.
• Blocked appliances.
• A sudden change in water quality.

At that point, the natural reaction is to search for a quick fix.

However, the visible problem is often only a symptom.

The real cause may be hidden inside the water chemistry.

A professional water analysis helps identify the actual reason behind the problem and ensures that the correct treatment technology is selected.

Below are some of the most common water problems experienced by homeowners, businesses, and industrial users.

Problem 1: Brown, Orange, or Rust-Coloured Water

What You Notice

• Orange stains around toilets.
• Brown marks on laundry.
• Rust-colored water.
• Metallic taste.
• Deposits inside pipes and appliances.

Possible Cause

The most common cause is:

Iron in Water

Iron naturally occurs in many borehole water sources.

Groundwater passes through mineral-rich rock formations and dissolves iron into the water.

When the water reaches the surface and reacts with oxygen, the iron can oxidise and form visible particles.

What a Water Analysis May Show

Example:

Why a Simple Filter May Not Work

Many customers purchase a basic sediment filter expecting it to remove iron.

However:

Sediment filters remove particles.

They do not remove dissolved iron effectively.

The iron must first be converted into a filterable form.

Possible Treatment Solutions

Depending on the analysis:

pH Correction

Improves water chemistry and treatment performance.

Oxidation

Converts dissolved iron into particles.

Iron Removal Filtration

Captures the iron particles.

Activated Carbon

Improves taste and odour.

Problem 2: Black Stains on Fixtures

What You Notice

• Black marks around taps.
• Dark deposits in toilets.
• Black staining on bathroom surfaces.

Possible Cause

Usually:

Manganese

Manganese is a naturally occurring mineral often found alongside iron.

What a Water Analysis May Show

Example:

Treatment Solutions

Possible solutions include:

• Oxidation.
• Catalytic filtration media.
• pH adjustment.
• Specialised manganese removal systems.

Problem 3: White Scale on Taps, Kettles, and Geysers

What You Notice

• White crust around taps.
• Scale inside kettles.
• Reduced geyser efficiency.
• Shower heads becoming blocked.

Possible Cause

Hard Water

Hardness is mainly caused by:

• Calcium.
• Magnesium.

When water is heated, these minerals can form deposits.

What a Water Analysis May Show

Example:

Treatment Solution

Water Softener

A softener uses ion-exchange technology to reduce hardness minerals.

Benefits:

• Reduced scale.
• Better appliance protection.
• Improved cleaning efficiency.

Important:

A softener does not remove:

• Bacteria.
• Nitrates.
• High TDS.
• Most dissolved salts.

If the water has multiple issues, additional treatment may be required.

Problem 4: Salty-Tasting Water

What You Notice

• Salty taste.
• Mineral taste.
• Water feels different.
• Tea and coffee taste unusual.

Possible Causes

High levels of dissolved minerals such as:

• Chlorides.
• Sodium.
• Sulphates.
• Other dissolved salts.

What a Water Analysis May Show

Example:

Why Carbon Filters Will Not Solve This

Activated carbon improves:

• Taste.
• Odour.
• Chlorine.

But it does not remove dissolved salts.

Treatment Solution

Reverse Osmosis

RO reduces dissolved substances and improves:

• Taste.
• Water quality.
• Mineral balance.

Problem 5: Bad Taste or Chlorine Smell

What You Notice

• Swimming pool smell.
• Strong chlorine taste.
• Unpleasant drinking water.

Possible Cause

Municipal water disinfection.

Chlorine is added to protect public water supplies, but some people dislike the taste and smell.

What a Water Analysis May Show

Example:

Treatment Solution

Activated Carbon Filtration

Activated carbon is highly effective at reducing:

• Chlorine.
• Taste.
• Odour.

Problem 6: Cloudy or Dirty-Looking Water

What You Notice

• Cloudiness.
• Floating particles.
• Dirty appearance.

Possible Causes

• Sand.
• Clay.
• Silt.
• Rust particles.
• Organic matter.

What a Water Analysis May Show

Example:

Treatment Solutions

Depending on severity:

Sediment Filtration

For larger particles.

Multimedia Filtration

For higher turbidity.

Cartridge Filtration

For fine polishing.

Important:

Cloudy water can also affect UV systems and reverse osmosis membranes.

Pretreatment may be required before advanced purification.

Problem 7: Rotten Egg Smell

What You Notice

• Rotten egg smell.
• Unpleasant odor when running taps.
• Smell increases after water stands.

Possible Cause

Hydrogen Sulphide Gas

This can occur naturally in some groundwater sources.

Treatment Options

Depending on severity:

• Aeration.
• Oxidation.
• Activated carbon.
• Specialized filtration.

Problem 8: Bacteria in Drinking Water

What You Notice

Sometimes:

Nothing.

This is what makes microbiological contamination dangerous.

Water containing bacteria may still look completely clear.

Possible Causes

• Poor borehole protection.
• Surface contamination.
• Damaged infrastructure.
• Storage tank contamination.

What Analysis May Show

Example:

Treatment Approach

A complete solution may include:

Filtration

Remove particles.

↓

UV Sterilisation

Reduce microorganisms.

↓

Source Investigation

Identify and correct contamination entry points.

Problem 9: Corroded Pipes and Blue-Green Staining

What You Notice

• Blue-green marks around taps.
• Metallic taste.
• Pinholes in plumbing.

Possible Cause

Aggressive Acidic Water

Often related to:

• Low pH.
• Low alkalinity.

Water Analysis Example

Treatment Solutions

• pH correction.
• Calcite filtration.
• Corrosion control.

Problem 10: Reverse Osmosis System Producing Less Water

What You Notice

• Slow production.
• Frequent membrane replacement.
• High operating pressure.

Possible Causes

The problem may not be the RO system itself.

Possible causes:

• High hardness.
• High SDI.
• Poor pretreatment.
• Scaling.
• Incorrect membrane selection.

What Analysis May Reveal

Example:

Possible Solutions

Improve pretreatment:

• Sediment filtration.
• Multimedia filtration.
• Softening.
• Antiscalant dosing.

Then optimise RO operation.

The Most Important Lesson

Water problems rarely have only one answer.

A brown stain may be iron.

A white deposit may be hardness.

A bad taste may be chlorine.

A slow RO system may be a pretreatment failure.

The correct solution begins with understanding the water.

Quick Reference: Common Problems and Treatment Options

Before choosing any treatment system, test your water.

The same symptom can have multiple causes.

That is why professional water analysis is the foundation of effective water treatment.

Instead of asking:

“Which filter should I buy?”

The better question is

“What does my water actually need?”

Once the water is understood, the correct solution becomes clear.

Frequently Asked Questions About Water Analysis and Water Treatment

When people start researching water quality, they usually have the same questions:

• Is my water safe?
• Do I really need a water test?
• What type of filter should I buy?
• Can I solve the problem myself?
• Is reverse osmosis necessary?
• How much treatment do I actually need?

These are important questions because water treatment is an investment.

The purpose of this section is to answer the most common questions clearly and help homeowners, businesses, and industrial users make informed decisions.

1. Why Should I Have My Water Tested?

A water analysis removes uncertainty.

Water can look clean while containing:

• Bacteria.
• Nitrates.
• Heavy metals.
• Excess minerals.
• Dissolved salts.
• Corrosive properties.

A visual inspection only tells you what you can see.

A laboratory analysis reveals what is hidden.

A professional water analysis helps you:

• Identify the actual problem.
• Choose the correct treatment system.
• Avoid unnecessary equipment.
• Protect appliances and plumbing.
• Improve drinking water quality.

2. Is Clear Water Always Safe to Drink?

No.

Clear water is not necessarily safe water.

Many contaminants are invisible, including:

• Bacteria.
• Viruses.
• Nitrates.
• Fluoride.
• Heavy metals.
• Dissolved salts.

For example:

A borehole can produce water that looks completely clean while containing harmful bacteria or excessive mineral levels.

This is why appearance alone should never determine whether water is suitable for drinking.

3. How Often Should Water Be Tested?

The frequency depends on the water source and application.

Municipal Water

Testing may be recommended:

• When moving into a new property.
• After plumbing changes.
• When taste or color changes occur.

Borehole Water

Borehole water should generally be monitored more frequently because groundwater quality can change.

Testing is especially important:

• After drilling a new borehole.
• After flooding events.
• When surrounding land use changes.
• When water quality changes.

Commercial and Industrial Applications

Testing frequency depends on:

• Production requirements.
• Industry standards.
• Water quality targets.

Businesses using water as part of their process should maintain regular monitoring.

4. Is Borehole Water Safe to Drink?

It depends on the water quality.

Borehole water can be excellent drinking water.

However, groundwater characteristics vary significantly.

Possible borehole water challenges include:

• Iron.
• Manganese.
• Hardness.
• Low pH.
• High TDS.
• Nitrates.
• Bacteria.

A borehole should always be tested before being used for drinking.

5. Can I Test My Water With a TDS Meter?

A TDS meter can provide useful information, but it does not provide a complete water analysis.

A TDS meter measures the following:

Total Dissolved Solids

It does not identify:

• Which minerals are present.
• Whether bacteria exist.
• Whether heavy metals are present.
• Whether nitrates are elevated.

Two water sources can have the same TDS but require completely different treatment.

Example:

Water A:

TDS:
700 mg/L

Main minerals:
Calcium and magnesium.

Possible treatment:
Softening.

Water B:

TDS:
700 mg/L

Main minerals:
Sodium and chlorides.

Possible treatment:
Reverse osmosis.

Same TDS.

Different solution.

6. Does Boiling Water Make It Safe?

Boiling can destroy many microorganisms.

However, boiling does not remove:

• Dissolved salts.
• Heavy metals.
• Nitrates.
• Fluoride.
• Chemicals.

In some cases, boiling can actually increase the concentration of dissolved minerals because some water evaporates while minerals remain.

Boiling is useful for emergency microbial protection, but it is not a complete water purification method.

7. What Is the Difference Between Filtration and Purification?

These terms are often used interchangeably, but they are different.

Filtration

Filtration removes specific contaminants by physically trapping or chemically adsorbing them.

Examples:

• Sediment filters remove particles.
• Carbon filters remove chlorine and taste compounds.
• Iron filters remove iron.

Purification

Purification generally refers to processes designed to produce higher-quality water by removing a wider range of contaminants.

Examples:

• Reverse osmosis.
• UV disinfection.
• Advanced treatment systems.

The correct approach depends on the water quality and intended use.

8. Does Reverse Osmosis Remove Everything From Water?

No.

Reverse osmosis is one of the most powerful water treatment technologies available, but it is not magic.

RO can reduce many dissolved contaminants, including

• Salts.
• Nitrates.
• Fluoride.
• Many dissolved minerals.

However, proper system design is still essential.

Performance depends on:

• Feed water quality.
• Pressure.
• Temperature.
• Membrane selection.
• Pretreatment.

9. Is Reverse Osmosis Water Healthy?

Reverse osmosis produces very high-quality water.

However, the question of “healthy” depends on the application and personal preference.

RO removes many dissolved substances from water.

Some systems include:

• Remineralization stages.
• pH balancing.
• Taste enhancement.

The correct configuration depends on the user’s goals.

10. What Is the Best Water Filter for My Home?

There is no single “best” filter.

The correct system depends on:

• Water source.
• Water analysis results.
• Household requirements.
• Budget.
• Desired water quality.

Examples:

Municipal Water With Chlorine Taste

Possible solution:

Activated carbon filtration.

Borehole Water With Iron

Possible solution:

Iron removal system.

High TDS Water

Possible solution:

Reverse osmosis.

Bacteria Concerns

Possible solution:

Filtration plus UV sterilization.

11. Can One Filter Remove All Water Problems?

Usually not.

Different technologies remove different contaminants.

For example:

A sediment filter:

Removes:

• Dirt.
• Sand.
• Suspended particles.

Does not remove:

• Salts.
• Bacteria.
• Hardness.

A carbon filter:

Removes:

• Chlorine.
• Taste.
• Odours.

Does not remove:

• High TDS.
• Hardness.

A softener:

Removes:

• Calcium.
• Magnesium.

Does not remove:

• Bacteria.
• Most dissolved salts.

A complete solution often requires several treatment stages working together.

12. Why Is My Water Different From My Neighbor’s Water?

Because water quality depends on many factors:

• Underground geology.
• Borehole depth.
• Water source.
• Rainfall.
• Surrounding land use.
• Plumbing conditions.

Two boreholes only a short distance apart may have completely different chemistry.

One may require:

• Iron removal.

Another may require:

• Reverse osmosis.

Another may require:

• Only basic filtration.

13. How Much Does Water Analysis Cost?

The cost depends on:

• Number of parameters tested.
• Type of water source.
• Required application.

A basic analysis may test common parameters.

A more detailed analysis may include:

• Heavy metals.
• Microbiology.
• Industrial parameters.

The important consideration is that water analysis can prevent spending thousands of rands on the wrong equipment.

14. Can I Install a Water Treatment System Myself?

Some basic filtration systems are suitable for DIY installation.

However, complex problems often require professional design.

Professional assistance becomes especially important for:

• Borehole systems.
• Commercial RO plants.
• Industrial applications.
• Multiple contaminant problems.

Incorrect installation can reduce performance and increase maintenance costs.

15. Why Does My Reverse Osmosis System Keep Blocking?

Common causes include:

• Poor pretreatment.
• High hardness.
• High SDI.
• Scaling.
• Incorrect operation.

A membrane failure is often a symptom of another problem upstream.

A water analysis can identify what is causing the issue.

16. Is Higher TDS Always Bad?

No.

TDS measures the total amount of dissolved material.

It does not tell you exactly what those materials are.

Some mineral-rich water can have higher TDS while still being acceptable.

However, very high TDS can affect:

• Taste.
• Appliance performance.
• Industrial suitability.

The complete water chemistry must be considered.

17. Why Does My Water Change Throughout the Year?

Water quality can change because of:

• Rainfall.
• Groundwater movement.
• Agricultural activity.
• Seasonal changes.
• Municipal supply changes.

For example:

Heavy rainfall may increase:

• Turbidity.
• Bacterial risk.

Dry periods may increase:

• Mineral concentration.

18. Should I Test Water Before Buying a Treatment System?

Yes.

This is one of the most important steps.

Buying equipment before testing water is like buying replacement parts before knowing what is broken.

A water analysis ensures that:

• The correct technology is selected.
• The system is correctly sized.
• Unnecessary costs are avoided.

19. What Happens After I Receive My Water Analysis Report?

The process should be:

Step 1

Review the results.

↓

Step 2

Identify the water quality challenges.

↓

Step 3

Determine the required treatment technologies.

↓

Step 4

Design a suitable system.

↓

Step 5

Install and maintain the solution.

20. Why Choose Puritech for Water Treatment Solutions?

A successful water treatment system requires more than equipment.

It requires:

• Understanding water chemistry.
• Correct system design.
• Appropriate technology selection.
• Long-term support.

Puritech’s approach focuses on solving the actual water problem rather than simply supplying a product.

The goal is simple:

Understand the water. Design the solution. Deliver reliable water quality.

Final Thoughts: Your Water Has a Story — Let the Analysis Reveal It

Every water source is different.

Some water contains too many minerals.

Some contain unwanted metals.

Some have microbiological concerns.

Some simply need improvement in taste and quality.

The mistake is assuming that every water problem has the same solution.

A professional water analysis transforms uncertainty into knowledge.

It tells you:

• What is in your water?
• What problems exist.
• What treatment is required.
• How to protect your investment.

Before purchasing any water treatment system, start with understanding your water.

Because the best treatment solution is not the one with the most filters.

It is the one designed specifically for your water.

Your Water Has a Story. Let Puritech Help You Understand It.

Every drop of water carries a unique chemical and biological fingerprint.

Whether your water comes from a municipal supply, a borehole, rainwater harvesting, a river, or another source, its quality is influenced by geology, infrastructure, climate, land use, and countless other factors.

That is why no two water sources are exactly alike.

Two neighbouring properties can experience completely different water quality challenges, even when drawing water from the same area.

One property may struggle with iron staining.

Another may have high hardness.

Another may have elevated nitrates.

Another may simply require improved taste and odour.

Without a professional water analysis, there is no reliable way to know which treatment solution is right for your water.

Start With Knowledge, Not Guesswork

Many people invest in water treatment equipment hoping it will solve their problem.

Sometimes it does.

Sometimes it only addresses part of the issue.

Sometimes it fails completely because the actual cause was never identified.

A professional water analysis helps remove uncertainty by answering important questions such as:

• Is my water safe to drink?
• Why does my water stain my fixtures?
• Why does my kettle keep scaling?
• Why does my reverse osmosis system require frequent maintenance?
• Why does my water taste salty?
• Why is my plumbing corroding?
• Is my borehole water suitable for household use?
• What treatment system will provide the best long-term results?

When these questions are answered with laboratory data and expert interpretation, selecting the right treatment solution becomes much easier.

What Happens After You Request a Water Analysis?

When you contact Puritech, the process is straightforward and designed to provide practical recommendations based on your specific water quality.

Step 1: Discuss Your Water Source

The first step is understanding where your water comes from.

Examples include:

• Municipal water.
• Borehole water.
• Rainwater harvesting.
• River or dam water.
• Commercial process water.
• Industrial water supplies.

Understanding the source provides valuable context before laboratory testing begins.

Step 2: Water Sampling

Depending on the application, a representative water sample is collected and prepared for analysis.

Correct sampling procedures are important because they help ensure the laboratory results accurately reflect your water quality.

Step 3: Laboratory Testing

The sample is analyzed for the relevant physical, chemical, and microbiological parameters.

The scope of testing depends on your water source, intended application, and any concerns you may have.

Step 4: Interpretation of Results

A laboratory report contains valuable data, but the numbers alone do not provide a complete solution.

Puritech reviews the results to identify:

• Water quality concerns.
• Potential risks.
• Factors affecting equipment performance.
• Appropriate treatment technologies.

The focus is on understanding the complete water profile rather than relying on a single measurement.

Step 5: System Design

Based on the analysis, Puritech recommends a treatment solution designed around your specific requirements.

This may include technologies such as:

• Sediment filtration.
• Activated carbon filtration.
• Water softening.
• Iron and manganese removal.
• Reverse osmosis.
• UV sterilization.
• Chemical dosing.
• Commercial or industrial treatment systems.

Every recommendation is tailored to the complete analysis and intended application.

Step 6: Installation, Support, and Ongoing Maintenance

A properly designed system performs best when it is installed correctly and maintained according to the manufacturer’s recommendations.

Regular maintenance helps:

• Maintain water quality.
• Protect equipment.
• Improve operating efficiency.
• Extend the lifespan of the treatment system.

Why Choose Puritech?

Choosing a water treatment partner is about more than purchasing equipment.

It is about working with a team that understands how water quality affects homes, businesses, and industrial operations.

Puritech’s approach is built on three principles:

Understanding

Every recommendation begins with understanding your water rather than making assumptions.

Appropriate Technology

Treatment technologies are selected based on laboratory results, water usage, and long-term performance requirements.

Long-Term Reliability

The goal is not simply to install a system but to provide a solution that continues delivering reliable water quality for years to come.

Before You Invest in Water Treatment, Invest in Understanding Your Water

A professional water analysis is one of the most valuable investments you can make before purchasing any treatment equipment.

It can help you:

• Avoid buying the wrong system.
• Protect your plumbing and appliances.
• Improve drinking water quality.
• Reduce maintenance costs.
• Extend the life of your equipment.
• Gain confidence that your treatment system is designed for your specific water.

When you understand your water, every decision that follows becomes more informed.

Request a Professional Water Analysis

If you are experiencing water quality problems—or if you simply want to understand what is in your water before investing in treatment—Puritech can help.

Whether you need guidance for a home, business, water shop, agricultural operation, or industrial facility, the first step is always the same:

Test the water. Understand the results. Design the right solution.

Contact Puritech to discuss your water source, arrange the appropriate testing, and receive expert guidance on selecting a treatment system tailored to your needs.

Conclusion

Water is one of our most valuable resources, yet it is often taken for granted until problems arise.

The good news is that most water quality issues can be identified, understood, and treated effectively when decisions are based on accurate information.

Throughout this guide, we’ve explored:

• Why clear water is not always safe.
• The importance of professional water analysis.
• Physical, chemical, and microbiological water testing.
• How to interpret common water quality parameters.
• Real-world water analysis examples.
• Common water problems and their causes.
• Why guessing can be expensive.
• How professional system design delivers better long-term results.

The key message is simple:

Every water source is unique.

The best water treatment solution is not determined by marketing claims or the number of filtration stages—it is determined by the quality of the water entering the system.

Understanding your water is the first step towards protecting your health, your equipment, your investment, and your peace of mind.

Let your water analysis tell the story.

Then let the right treatment solution write the next chapter.