Treatment plants
Dunedin's eight wastewater treatment plants service communities ranging in size from 100 to 83,000. The following table shows the details of each community's reticulation system.
| Community | Reticulation (km) (Total 850.9) | Treatment method | Annual discharge approx m³ |
|---|---|---|---|
| Metropolitan | 568.6 | Primary sedimentation with treated wastewater discharged at Lawyers Head | 18,993,000 |
| Green Island | 131.6 | Secondary treatment with UV disinfection. Treated wastewater discharged to ocean outfall | 2,447,000 |
| Mosgiel | 74 | Secondary treatment and disposal via Green Island WWTP | 1,653,000 |
| Port Chalmers | 34.5 | Via metropolitan scheme | N/A |
| Middlemarch | 6.0 | Oxidation pond and wetland | 20,000 |
| Seacliff | 1.2 | Rapid sand filter followed by land irrigation | 2,800 |
| Waikouaiti / Karitane | 28.7 | Oxidation ponds followed by land irrigation | 161,000 |
| Warrington | 6.4 | Oxidation ponds followed by land irrigation | 3,500 |
Last reviewed: 12 Jul 2008 7:14pm
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