What we operate
Wastewater services in Selwyn protect public health and the environment.
We collect, treat and safely dispose of wastewater from 15 township schemes across the district.
Our wastewater network includes:
- 6 treatment plants
- 70 pump stations
- 3 oxidation ponds
- Around 736km of pipes
Our responsibilities and yours
We own and maintain the wastewater network up to your property boundary – including pipes, pump stations and treatment plants.
From the boundary into your home, the pipes and connections are your responsibility to maintain.
Private on-site systems
Some rural properties aren't connected to our network and rely on private systems such as septic tanks. Where a reticulated system is available, connection is generally required to make sure wastewater is managed safely and consistently.
If you're on a private system, you're responsible for maintaining it and meeting any consent conditions from Environment Canterbury.
Pines Wastewater Treatment Plant
The Pines is our main treatment facility, built near Rolleston in 2012. It serves Rolleston, West Melton, Lincoln, Prebbleton and Springston – treating wastewater and disposing of treated effluent through irrigation to a dedicated disposal area.
As the district grows, we're investing in staged upgrades to increase the plant's capacity, efficiency and long-term resilience.