Perisher Sewage Treatment Plant

The Perisher Sewage Treatment Plant (STP) treats sewage effluent collected from Perisher Valley, Smiggin Holes and Guthega.

The Perisher Sewage Treatment Plant operates under Environment Protection Licence No. 1797, issued by the Environment Protection Authority (EPA).

A pollution incident response management plan is required to be prepared and implemented under the Protection of the Environment Legislation Amendment Act 2011.

Licence

View the Environment Protection Licence No. 1797 terms and conditions.

Licensee
State of New South Wales (Department of Planning and Environment)
PO Box 41
Perisher Valley NSW 2624

Premises
Perisher Sewage Treatment System including the STP at
North Perisher Road
Perisher Valley NSW 2624

Monitoring points
There are 3 monitoring points.

  • Monitoring Point 1 – Discharge from UV chamber
  • Monitoring Point 2 – Perisher Creek Upstream
  • Monitoring Point 3 – Perisher Creek Downstream

View map of monitoring points (PDF 660KB).

Monitoring frequency required by Environment Protection Licence No. 1797 for all points is:

  • fortnightly from July to October inclusive
  • monthly from November to June inclusive.

Pollutant monitoring data

Regular monitoring and reporting of specified pollutants is required by Environment Protection Licence No. 1797.

Current year | 2023–2024 | 2022–2023 | 2021–2022 | 2020–2021 | 2019–2020

2024–2025 data

Monitoring point 1 – Discharge to waters effluent quality monitoring

Discharge from the UV chamber to Perisher Creek.

Date pH Nitrogen (ammonia) Nitrogen (total) Phosphorus (total) Total suspended solids Biochemical oxygen demand Oil & grease Faecal coliforms Total aluminium Data obtained Data published
    mg/L mg/L mg/L mg/L mg/L mg/L cfu/100mL mg/L    
12-Jun-24 6.5 0.3 1.9 0.23 13 <2 <1 15.0 0.45 21-Jun-24 21-Jun-24
10-Jul-24 6.3 0.5 1.8 0.04 7 <2 <1 30 0.59 22-Jul-24 24-Jul-24
24-Jul-24 7.1 0.8 3.3 0.26 15 2 <1 488 0.97 1-Aug-24 2-Aug-24
07-Aug-24 7.2 0.8 4.8 0.17 10 4 <1 134 1.38 16-Aug-24 22-Aug-24
21-Aug-24 7.6 1.4 5.8 0.18 8 3 <1 40.0 1.05 29-Aug-24 02-Sep-24
04-Sep-24 7.9 0.6 4.3 0.29 9 2 <1 <2 1.10 16-Sep-24 18-Sep-24
18-Sep-24 7.9 1.2 6.8 0.49 15 8 <1 <1 0.78 27-Sep-24 01-Oct-24
02-Oct-24 7.3 0.4 2.5 0.17 9 <2 <1 20.0 0.61 15-Oct-24 17-Oct-24
30-Oct-24 7.7 1.2 7.0 0.28 19 5 – – 0.45 11-Nov-24 12-Nov-24

Monitoring point 2 – Ambient water monitoring (Perisher Creek upstream)

Date pH Nitrogen (ammonia) Nitrogen (total) Phosphorus (total) Total suspended solids Biochemical oxygen demand Faecal coliforms Total aluminium Data obtained Data published
    mg/L mg/L mg/L mg/L mg/L cfu/100ml mg/L    
12-Jun-24 6.8 0.005 0.19 <0.01 6 <2 29 0.32 21-Jun-24 21-Jun-24
10-Jul-24 6.8 0.004 0.10 0.02 2 <2 <1 0.09 22-Jul-24 24-Jul-24
24-Jul-24 7.5 0.005 0.10 <0.01 <2 <2 <1 0.06 1-Aug-24 2-Aug-24
07-Aug-24 7.3 <0.002 <0.05 <0.01 <2 <2 <2 0.05 16-Aug-24 22-Aug-24
21-Aug-24 7.3 0.005 0.15 <0.01 3 1 1 0.19 29-Aug-24 02-Sep-24
04-Sep-24 7.3 0.004 0.10 <0.01 <2 <1 <1 0.08 16-Sep-24 18-Sep-24
18-Sep-24 7.6 0.002 0.09 <0.01 <2 <1 <1 0.07 27-Sep-24 01-Oct-24
02-Oct-24 7.2 0.004 0.08 <0.01 <2 <2 <2 0.06 15-Oct-24 17-Oct-24
30-Oct-24 7.6 0.003 0.07 <0.01 <2 <2 <2 0.06 11-Nov-24 12-Nov-24

Monitoring point 3 – Ambient water monitoring (Perisher Creek downstream)

Date pH Nitrogen (ammonia) Nitrogen (total) Phosphorus (total) Total suspended solids Biochemical oxygen demand Faecal coliforms Total aluminium Data obtained Data published
    mg/L mg/L mg/L mg/L mg/L cfu/100ml mg/L    
12-Jun-24 6.8 0.004 0.15 0.02 5 <2 22 0.31 21-Jun-24 21-Jun-24
10-Jul-24 7.2 0.002 0.07 <0.01 <2 <2 <1 0.09 22-Jul-24 24-Jul-24
24-Jul-24 7.2 0.005 0.09 <0.01 <2 <2 <1 0.05 1-Aug-24 2-Aug-24
07-Aug-24 7.1 0.008 <0.05 <0.01 3 <2 <2 0.05 16-Aug-24 22-Aug-24
21-Aug-24 6.9 0.007 0.15 <0.01 3 1 1 0.19 29-Aug-24 02-Sep-24
04-Sep-24 7.7 0.004 0.10 <0.01 <2 <1 <1 0.08 16-Sep-24 18-Sep-24
18-Sep-24 7.4 <0.002 0.09 <0.01 <2 <1 <1 0.07 27-Sep-24 01-Oct-24
02-Oct-24 6.9 0.006 0.08 <0.01 <2 <2 <2 0.07 15-Oct-24 17-Oct-24
30-Oct-24 6.4 0.003 0.09 <0.01 <2 <2 <1 0.06 11-Nov-24 12-Nov-24