Sustainability Indicator:
Total Dissolved Solids (TDS)

Commitment:
To reduce the concentration of TDS (salt) discharged into our sewers, by our industrial customers, by 20% or 49 tonnes per day by 2009-10.

How we’ve performed:

Total dissolved solids

2005-2006

2006-2007

2007-2008

Median concentration of TDS flowing into Western Treatment Plant (milligrams per litre)

950

970

1014

Trade waste customer loads (tonnes per day)

104

104

98

Maximum target (tonnes per day)

152

144

125

Looking ahead:
We will continue to focus on avoiding contaminants at the source, which will be a key to ensuring that the Western Treatment Plant effluent and biosolids are sustainably recycled.