A woman drinking a glass of filtered water

Understanding Your Water

What a water test actually tells you. And why it matters.

Most people assume their tap water is fine because it looks clear and tastes normal. But many contaminants have no colour, taste, or smell. A water test removes the guesswork and gives you a clear picture of what's actually in your supply.


Where does tap water come from, and where do contaminants enter?

Australian tap water travels a long way before it reaches you. Treatment at the plant removes the most serious pathogens and bacteria, but the journey through distribution infrastructure introduces its own risks.

1

Source water — catchments, rivers, and reservoirs

Naturally occurring minerals, agricultural runoff, industrial discharge, and environmental pollutants can all be present in raw source water. The quality of source water varies significantly by region and is affected by drought, flood, and land use nearby.

2

Treatment plant

Chlorine or chloramine is added to kill bacteria and pathogens. Fluoride may be added. Sediment and some contaminants are filtered. Treatment meets Australian Drinking Water Guidelines, but not all contaminants are tested for or removed at this stage.

3

Distribution network — pipes and mains

Water travels through a network of pipes before reaching your street. Older infrastructure may leach lead, copper, or other metals. Disinfection byproducts can form as chlorine reacts with organic matter during transit.

4

Your home's plumbing

From the street main to your tap is where lead solder, older fittings, or corroded pipes can add contaminants to water that was clean when it entered your property. Homes built before 1990 carry higher risk from internal plumbing.

5

Your tap

What comes out is the result of all the steps above. Water that tested clean at the treatment plant may contain contaminants that were picked up in transit. A home water test measures what's actually in your water at the point of use, not what left the plant.


When should you think about testing?

These situations are reasonable prompts to find out more about your water quality. They're not cause for alarm, but a cause for information.

You live in an older home

Properties built before 1990 may have lead-containing solder or fittings in internal plumbing. Worth knowing, regardless of symptoms.

Your water tastes or smells unusual

A pool smell, chemical odour, or sulphur-like smell are signals worth investigating. They often point to elevated disinfectant levels or issues in the plumbing.

You're near industrial or agricultural land

Properties near airports, military bases, industrial sites, or farmland face elevated risk of PFAS, nitrate, or pesticide contamination in groundwater.

You've noticed scale or discolouration

White mineral deposits on taps, brown water, or cloudiness are visible indicators of water quality issues that a test can confirm.

Your area has had flooding or infrastructure works

Heavy rain, flooding, or nearby construction can disturb pipes and introduce contaminants to the local supply, sometimes temporarily.

You simply want to know

Curiosity is a perfectly good reason. Many people have water tested, not because they've noticed a problem, but because they want clarity on something they use every day.


What does a water test actually reveal?

A professional in-home water assessment goes further than anything you can buy at a hardware store. Here's what it covers.

  • Chlorine and chloramine levels — how much disinfectant is present in your supply
  • Heavy metal concentration — lead, copper, and other metals that may have leached from pipes
  • Total dissolved solids (TDS) — the overall mineral load in your water
  • Water hardness — calcium and magnesium levels contributing to scale and limescale
  • pH level — whether your water is acidic or alkaline, which affects taste and pipe interaction
  • Odour and taste indicators — the source and severity of any sensory issues
  • A clear recommendation — or no recommendation at all if the results don't warrant one

The goal of a water test isn't to find something wrong. It's to give you an accurate picture so you can make a decision based on facts, not guesswork.

Want to understand what specific contaminants mean for your health? See What's in Your Water for a full breakdown. Or read our Health & Wellbeing page to understand how water quality connects to everyday health outcomes.

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DISCOVER EVEN MORE BENEFITS OF BETTER WATER?

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