Premises:
Walcha Sewage Treatment Plant, Oxley Highway, Walcha NSW 2354.
The concentration limit of the pollutants at a discharging point is given below:
| Pollutant | Units of Measure | 90 percentile concentration limit |
|---|---|---|
| Oil & Grease | Milligrams per litre | 10 |
| pH | pH | 6.5 – 8.5 |
| Total Suspended Solids | Milligrams per litre | 30 |
| Biochemical oxygen deman | Milligrams per litre | 20 |
The licensee is not taken to have exceeded a quality limit specified in this licence for BOD, TSS or pH if:
- Monitoring by the licensee shows that the level of chlorophyll-a in the maturation ponds during any exceedance was 50ug/L or more (showing that the exceedance was caused by excessive algal growth); and
- The liquid waste entering the maturation ponds during the exceedance complies with the quality limit.
Monitoring Results for 2022 – 2023
- Monitoring Results for 2021 – 2022
Monitoring Points Map
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