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Learn about our drinking water quality monitoring program

Sydney’s water is from natural sources. It’s filtered to the high standards set by the Australian Drinking Water Guidelines. This helps assure your water is safe to drink straight from the tap.

We analyse samples in laboratories for about 70 different features. This includes taste and odour, colour, micro-organisms and chemical content.

Learn more about how we provide Sydney with safe drinking water or look at our daily drinking water quality report to check the water quality in your area.

Drinking water

Our water quality scientists do up to 70 different types of tests to confirm your drinking water is high quality and safe. We collect and test samples taken from source to tap, including lakes and rivers, our filtration plants and at homes and businesses.

The water quality report shows typical values for a selection of characteristics from the last quarter. These values are a range of all results from the 10th to the 90th percentile unless stated otherwise.


When installing new appliances like dishwashers, steam ovens and coffee machines, you may need to know the hardness, pH, or other information about your water.

Depending on where your appliance was made, you may need this information in different formats to help your appliances work efficiently. We've provided the information in the most common units of measure.

Home brewing

The quality of your tap water can play a part in the final result of your home-brewed drinks.

We've provided the results of recent water quality testing in your area for features that affect home brewing.


We add different chemicals, such as chlorine, to Sydney's drinking water to help make it safe to drink.

While these chemicals are present at low and safe levels, they may affect the fish or other creatures in your aquarium. To reduce chlorine levels, leave the water in an open container for 24-36 hours. It should then be suitable to add to your aquarium. If you're not sure, please check with your local aquarium supplier.


If you’re a student looking for information for research or an assignment, our Education pages may help. Read below to find out more about how we manage the water supply.


Australian Drinking Water Guidelines

The Australian Drinking Water Guidelines (ADWG) provide guidance on how to manage the water supply to produce safe drinking water. The guidelines are some of the strictest in the world.

They help us assess drinking water quality by specifying health-based criteria and setting standards for how your water should look, smell and taste. They also include a 'multiple barrier approach' from catchment to tap. This is how we assure your water is safe to drink.

We report daily on the success of these 'barriers' in our Daily drinking water quality report.


Water management

We supply you with high quality, safe drinking water managed under our drinking water management system. This means our drinking water:

  • meets the standards set out in the Australian Drinking Water Guidelines

  • satisfies two of our key regulators - NSW Health and the Independent Pricing and Regulatory Tribunal (IPART).


Quarterly Drinking Water Quality Report

The report includes details about how we've met the Australian Drinking Water Guidelines. It also includes test results for about 70 different features of your water, including taste and odour, colour, micro-organisms and chemical content.

Water quality report

Sydney’s water is from natural sources. It’s filtered to the high standards set by the Australian Drinking Water Guidelines.

For daily updates on how our water treatment processes and systems are performing so your water is safe to drink straight from the tap, check our daily drinking water quality report.

Enter your address to see the water analysis for your area

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