Plans are progressing for much needed improvements to Gracetown’s water supply, which includes the development of a self sustaining recycled non-potable water system.
The use of rainwater tanks for drinking water, combined with the Class A+ recycling of household wastewater for non-drinking use was chosen as the preferred water-supply option for the existing Gracetown townsite and the proposed residential development site.
Following a national Expression of Interest process, United Utilities Australia has been identified as the preferred proponent to construct, own and operate the planned water supply service.
United Utilities Australia will apply for a water licence from the Economic Regulation Authority in 2011.
Further community consultation will be scheduled then as the water proposal undergoes a separate licensing application and design process in 2011.
Gracetown’s new recycled water system is currently scheduled to be operational in 2012.
Water concepts Shows the current plans for the water management at Gracetown. This was originally shown to the community in April 2007
Drinking water
Our proposal will see drinking water provided by harvesting roof run-off and individual rainwater tanks which are privately owned by landowners.
To manage water quality we will install ‘first-flush diverters’ and domestic ultraviolet light disinfection.
Currently, water quality from rainwater tanks is not measured, so to further help ensure a safe drinking supply, water tank inspections should be carried out in the future.
By using water-efficient appliances and providing a separate non-drinking water supply, a 45,000L tank should be sufficient to meet drinking water needs (including supplying kitchen, showers and basins).
This system also meets reliability standards recommended by the Commonwealth Government.
By adopting these recommended measures, the annual household demand on drinking water supply could possibly be reduced from 160.2kL/house/year (439L/house/day) to 99.3kL/house/year (272L/house/day).
Non-drinking water supply
Wastewater is currently handled by septic tanks at Gracetown. The switch to the recycled water system will allow the decommissioning of septic tanks, improving Gracetown’s contaminated groundwater.
Proposed to be located well away from existing homes at the disused rubbish tip, the plant will deliver recycled water directly into new and existing homes for laundry and water use through a dedicated non-drinking water network.
The non-drinking water supply would also provide a reliable and sustainable water supply for fire fighting – a pressing need in Gracetown in summer and autumn.
Surplus Class A+ treated and recycled wastewater would be used to recharge groundwater and provide a backup supply during maintenance periods.
Fire management
Under the new supply measures, water for fire fighting will be provided through a number of hydrants installed in the town. We are now working with the Fire and Emergency Services Authority (FESA) and the Department of the Environment and Conservation (DEC) to develop a comprehensive fire management strategy for the existing townsite and the proposed new development.
