What is the likely environmental impact? eg on the Swan River or the marine reef system?
Recycled water is likely to have significant concentrations of the nutrients nitrogen and phosphorus, even once treated to a very acceptable level for irrigation. This nutrient content would replace fertilisers currently used on irrigated turf and users of recycled water would be expected to reduce their fertiliser use accordingly. Thus most of the nutrient in the water would be captured by the irrigated turf. Any water recycling scheme would be designed to have negligible environmental impact on the Swan River and the marine environment and would require approval by Department of Environment.
