In order to obtain a BASIX Certificate confirming compliance with the NSW Government's sustainability requirements, a residential development proposal is required to use up to 40% less potable water than the average home 'pre-BASIX' home benchmark of 90,340 litres of water per person per year or 247 litres per person per day.
The water target varies for different climatic zones in NSW. It ranges from 40 to 0 across depending on the location of the house or unit. See Water target zones
- No new home built in NSW will use more water than the current state average.
- The 40% water target covers 90% of new residential development, which represents 98% of NSW population growth.
- Developments in areas covered by the 0% target still need to reduce water consumption in order to meet the state average water use benchmark.
- The BASIX targets are determined from data provided by state and federal energy and water utilities, as well as long-term climate data from the Bureau of Meteorology.
General tips for reaching water targets
- Select the highest WELS rated fittings and fixtures available for your development, including efficient showerheads, dual flush toilets, and flow regulators in your taps.
- Install an alternative water supply, such as a rainwater tank and connect it for internal use (toilets and/or laundry).
- Install an alternative water supply for garden use and include low water use species as part of your landscaping plan.
- Include shading and a permanent cover for any pool or outdoor spa.
- There are a number of additional options available to multi-unit developments.