Torbay Catchment Public Water Drinking Supply Designated Protection ('P') Areas

Total Nitrogen short and long term trend to 2010

Site code Site name TN classification TN short term trend (2006 to 2010) TN long term trend (2001 to 2010)
603001 Marbellup Brook moderate Emerging increasing trend of 0.033 mg/L/yr Emerging increasing trend of 0.028 mg/L/yr
603024 Seven Mile Creek moderate No trend Increasing trend of 0.041 mg/L/yr
603025 Torbay Drain High No trend No trend
6031115 Five Mile Creek high Increasing trend of 0.1 mg/L/yr Decreasing trend of 0.021 mg/L/yr
6031116 Cuthbert Drain Very high Emerging increasing trend of 0.11 mg/L/yr Emerging increasing trend of 0.033 mg/L/yr
6031117 Grasmere Creek High No trend Increasing trend of 0.082 mg/L/yr

Total Phosphorus short and long term trend to 2010

Site code Site name TN classification TN short term trend (2006 to 2010) TN long term trend (2001 to 2010)
603001 Marbellup Brook High Emerging increasing trend of 0.005 mg/L/yr No trend
603024 Seven Mile Creek High No trend No trend
603025 Torbay Drain High No trend No trend
6031115 Five Mile Creek Very High Decreasing trend of 0.04 mg/L/yr Decreasing trend of 0.021 mg/L/yr
6031116 Cuthbert Drain High Emerging increasing trend of 0.02 mg/L/yr Emerging increasing trend of 0.004 mg/L/yr
6031117 Grasmere Creek Very High No trend Decreasing trend of 0.02 mg/L/yr

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