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Drinking water quality

Greater Western Water is governed by the Safe Drinking Water Act 2003 and Safe Drinking Water Regulations 2015 for the provision of drinking water to customers.

We closely monitor the quality of drinking water supplies to ensure compliance with standards set out in the Safe Drinking Water Regulations 2015.

We also adopt other industry guidelines associated with health and aesthetics of drinking water including the Australian Drinking Water Guidelines (ADWG). This ensures that our water quality targets are more than adequate and are used to set our physical, chemical and microbiological performance targets.

Monitoring and reporting

We ensure the health and aesthetic quality of water through a rigorous process of monitoring and reporting.

Monitoring includes continuous measurement of key parameters using online instruments linked to alarm systems and graphic displays, daily operational checks by treatment plant staff and weekly independent testing and monitoring.

Water samples are collected from reservoirs, water filtration plants, storage tanks, pump stations and customer taps. They are tested for a range of microbiological, physical, chemical, algal and radiological parameters. All external testing is undertaken through independent laboratories accredited by the National Authority of Testing Association (NATA).

In addition to scheduled testing, non-routine testing is used to investigate water quality trends, source variation issues, customer complaints or any suspected contamination issues. Non-routine testing may either be done by external NATA accredited laboratories or by operational testing, depending on the nature of the issue and the water quality information needed.

Comprehensive water quality results can be found in our annual Water Quality Report.

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