Adelaide considers recycled stormwater ...

Excerpt from The Advertiser:

Stormwater for drinking

22 October 2007

Adelaide residents will be drinking recycled stormwater as traditional water supplies continue to dwindle, says the National Water Commission.

South Australia's representative on the commission Dr John Radcliffe says treated stormwater will form part of SA Water's metropolitan supply in the future to ensure long-term water security in the city.

Dr Radcliffe said governments had traditionally treated stormwater as a "hazard" and as waste which could not be used.

He said stormwater should instead be seen as a resource.

"People naturally feel a little concerned about drinking water that doesn't fall off the hillsides, but some of these hillsides aren't that pristine," he said.

"All water is recycled water, that's the hydrological cycle."

Stormwater is already collected, stored and used for irrigation purposes in parks across Adelaide.

A world-first trial to treat stormwater naturally in underground aquifers to a standard suitable for human consumption is now under way at Parafield.

Dr Radcliffe said the trial was one reason why South Australia was more advanced in stormwater reuse than elsewhere in Australia. "One has to look at all water resources that are around and there is no perfect resource for a particular circumstance," he said.

"One of the benefits is that (treated stormwater) has a lot less salinity than is found in Adelaide tap water."

Treated stormwater will be added to the mains water pipes and dispersed among households.

The water will supplement existing sources but figures on what portion of existing supply could be supplemented are yet to be researched.

Draft guidelines on the use of recycled water for drinking have been developed by the National Water Commission.

They are expected to be endorsed by state water ministers, including SA Water Security minister Karlene Maywald, when they meet to discuss the guidelines early next year.

See - Stormwater for drinking.