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Water quality

  • The availability of clean, safe to drink, water is fundamental to the health and welfare of the Selwyn Community. There are nine river/gallery intakes, and 24 deeper groundwater takes.
  • Drinking water is provided by the Council to over 75% of the population of the District around 41,000 people.
  • Water is supplied for public needs including household, gardens, and public reserves.
  • Source, treatment plant and reticulation water is regularly tested for the presence of bacteria.
  • The backflow prevention policy sets out the backflow prevention requirements for new and existing properties in the district.
  • Can I swim here?

More about water quality and Water sources and ways of treatment


Our water Schemes

Selwyn District Water Schemes


Managing our water demand

  • We manage over 30 water supplies across the District that spans from Arthur's Pass to Taumutu in the southern region.
  • The Council's Water Conservation and Demand Management Plan [PDF, 1593 KB] provides background information and an analysis of water management in the Selwyn District, and presents a plan for improved water demand management. This plan was approved by Council on 8 June 2016.
  • High growth in the eastern urban townships including Rolleston, Lincoln, West Melton and Prebbleton, is driving the need for more public drinking water from these townships sources - both at existing and new sites.
  • For some townships residents are able to self-monitor scheme capacity and adjust water usage to suit e.g. don’t irrigate lawns while the scheme is under pressure.
  • We always encourage all users to wise water consumption.

Further information about the districts water supplies is available in the 5Waters Activity Management Plans


More information about water management across the country:

  • To understand how much water is available in our region and how we manage it, you can visit the Regional Council's website: LAWA (Land, Air, Water Aotearoa) website.
  • To understand how we are doing compared to other districts you can visit Water Nz website.