Water pressure exemption

Following a review of our Operating Licence, we have commenced notifications to existing customers who receive water supply that falls outside the standard operational requirements. This affects around 4,000 customers across WA.

Under our Operating Licence, we are required to provide customers water pressure within a standard range of 15 to 100 metres head (mH) in the metropolitan area, and 13 to 100mH in regional areas. Metres head is the measurement used to determine water pressure and it refers to the height (head) which water rises vertically in a pipe.

Water pressure generally varies between different households. Typically, due to the topography and contours in the land, where it's difficult to ensure consistent range of water supply through the pipes. This is common in the Perth Hills and some regional areas,

As a strategy for reducing water loss, we also run a water pressure management program. This program aims to reduce water pressure in targeted areas, where pressure exceeds 50mH. Typically, we aim to deliver 35mH, which is more than double the legal requirement.

Water pressure management

To find out if your property receives water pressure outside the standard pressure range, enter your customer account number or property address in the table below. You can find your account number in the top right hand corner of your water bill or online via your MyWater account.

High pressure search

Pressure Exemption Areas

100-120 100m-120m  120-150 120m-150m  150-180 150m-180m  180-200 180m-200m  over200 Over 200m  Less than 100 Less than 100m  

Disclaimer: Please note this map is current as at May 2017 and may be subject to change.

Frequently asked questions

We are issued with an Operating Licence by the Economic Regulation Authority under the Water Services Act 2012. Operating Licences are a legal requirement for entities who supply potable water, non-potable water, sewerage, irrigation and drainage services. The purpose of an Operating Licence is to set minimum service and performance standards.

We are required to provide customers a static water pressure ranging from 15 to 100 metres head (mH) in the metropolitan area, and 13 to 100mH in regional areas. However, there are some properties where flow and pressure standards cannot be met.

Pressure is the force which pushes water through pipes and determines the flow of water from the tap. 

The amount of pressure at your tap depends on how high the service reservoir or water tower is above your home. Properties at the top of a hill may have a different pressure to properties lower on the hill. High pressure can be a result of being lower on a hill and/or situated below a reservoir or water tower.

Property owners are advised that the assessment of maximum pressure is based on an area of the property, measured 30 metres back from the block's supply point. Unlike standard residential sized blocks, where generally the whole lot is within a 30 metre distance, it is difficult to provide standard service levels to all parts of large blocks.

Plumbing fixtures and household appliances are designed to operate within particular water pressure specifications. Damage can be caused to pipes and appliances where water pressure specifications are exceeded.

High water pressure can also increase the occurrence of leaks and bursts and could potentially shorten the life of appliances and plumbing fixtures.

High water pressure may also cause excessive noise in your water pipes.

There are a lot of variables associated with the design of your internal plumbing system that impact the pressure you will experience. These factors include slope of the land, pressure losses through pipes, valves, fittings, meters and other equipment installed on your property.

From 2003 the Australian Standard for Plumbing and Drainage of Water Services (AS3500) outlines that plumbers shall ensure that the maximum static pressure at any outlet, other than a fire service outlet, within a building does not exceed 50 meters head. It is likely your property already has some pressure management.

Should you have any concerns regarding your internal plumbing, or if you're interested in reducing the water pressure inside your home, but not to other areas of your property i.e. reticulation, we recommend contacting a certified Waterwise plumber to discuss further.

Search for a Waterwise plumber

If you are interested in reducing the water pressure to your entire property, register your details using the customer form below and a customer representative will contact you to discuss further.

High water pressure may result in higher water usage and hence a larger usage bill. For example, the higher the water pressure, the more litres per minute the shower will use. 

High water pressure may also increase the risk of leaks and bursts. Undetected leaks will increase your water usage. 

Being exempt from water pressure standards does not change your current water bill costs.

For water saving tips, or to check your rostered watering days, see our Save water section. 


A water pressure exemption notification will be included on the Landgate Property Investment Report. This will allow prospective buyers to determine if a property has a water pressure exemption.

A notification will also be included on your Water Corporation customer water use and service charges account.

Yes, impacted customers will be notified on an annual basis via their customer service charges and water use bill.

Contact us

If you are interested in reducing water pressure to your entire property, please register your details below and a customer representative will contact you shortly.

High pressure areas