TABLE 2.1: Wastewater limit values applicable to discharge of wastewater into a water Resource
| SUBSTANCE/PARAMETER | GENERAL LIMIT | SPECIAL LIMIT |
|---|---|---|
| Faecal Coliforms (per 100 ml) | 1000 | 0 |
| Chemical Oxygen Demand (mg/I) | 75 (i) | 30 (i) |
| pH | 5.5 to 9 | 5.5 to 7.5 |
| Ammonia (ionised and un-ionised) as Nitrogen (mg/I) | 6 | 2 |
| Nitrate/Nitrite as Nitrogen (mg/I) | 15 | 1.5 |
| Chlorine as Free Chlorine (mg/I) | 0.25 | 0 |
| Suspended Solids (mg/I) | 25 | 10 |
| Electrical Conductivity (mS/m) | 70 mS/m above intake to a maximum of 150 mS/m | 50 mS/m above background receiving water to a maximum of 100 mS/m |
| Ortho-Phosphate as phosphorous (mg/I) | 10 | 1 (median) and 2.5 (maximum) |
| Fluoride (mg/I) | 1 | 1 |
| Soap, oil or grease (mg/I) | 2.5 | 0 |
| Dissolved Arsenic (mg/I) | 0.02 | 0.01 |
| Dissolved Cadmium (mg/I) | 0.005 | 0.001 |
| Dissolved Chromium (VI) (mg/I) | 0.05 | 0.02 |
| Dissolved Copper (mg/I) | 0.01 | 0.002 |
| Dissolved Cyanide (mg/I) | 0.02 | 0.01 |
NOTES
- After removal of algae (i)
- Above wastewater limits will be subject to review from time to time based on the outcome of the classification and resource quality objectives processes)
STAATSKOERANT, 6 SEPTEMBER 2013 No. 36820 13