What we manage
Selwyn Water manages 26 drinking water schemes across the district, spanning from Arthur’s Pass in the north to Taumutu in the south. Together, these schemes supply safe, reliable drinking water to communities across Selwyn’s rapidly growing and diverse region.
Selwyn's drinking water schemes
Our network includes:
- 26 drinking water schemes
- 37 treatment plants
- 1,549km of drinking water pipes
- 91 reservoirs
- 17 ground water supplies
- 9 surface water supplies
Where Selwyn's water comes from
We source water from both groundwater and surface water, with treatment tailored to the level of risk associated with each source.
Groundwater (aquifers)
- Deep, secure groundwater: These sources are protected from surface water contamination and are generally considered higher quality water supplies.
- Shallow or insecure groundwater: Shallow bores and wells are at greater risk of contamination and typically require a higher level of treatment to ensure safety.
Surface water
Sourced from rivers, streams, and creeks, these open catchment sources carry a higher contamination risk and require more advanced treatment before water is distributed to homes and businesses.
We use multiple layers of treatment and regular monitoring to make sure drinking water across Selwyn meets national standards and is safe to drink – now and into the future.
