Water supply


Water supply

Use a bit less water, make a big difference

There are loads of easy ways to use a bit less water - and help make a big difference. Check out our water conservation tips.

Water supply to Lower Hutt, Porirua, Upper Hutt and Wellington

We've completed the work to upgrade the Stuart Macaskill storage lakesThis project is an example of our work to ensure resilience of the bulk water supply network in the event of a natural disaster such as an earthquake.

High quality water is essential for the health and wellbeing of our region.  The cities of Lower Hutt, Porirua, Upper Hutt and Wellington are all supplied water by Greater Wellington Regional Council.

Our role as bulk water supplier to the region's cities involves:

  • Operating four water treatment plants, 15 pumping stations and just over 180 kilometres of large-diameter pipelines
  • Supplying enough water each day - around 140 million litres on average - to meet the needs of over 395,000 people
  • Maintaining a high quality of treated water, consistent with New Zealand's drinking water standards
  • Planning to ensure that the water needs of future generations can be met
  • Managing assets with a replacement value of almost $464 million

Our part in providing the region's water supply costs around $25 million dollars annually, or 50 cents per thousand litres. Each week we deliver enough high-quality water to fill Wellington's Westpac Stadium.

The Water Supply Annual Report for the year ended 30 June 2013 is available to download.  Click on the report in the Documents box on the right hand side of your screen.

Planning for regional growth

Our water supply system is nearing its design capacity. A major new water source will almost certainly be needed in the next few years unless water use per person can be reduced as the population grows. To read about our planning to meet the future water needs of the region's cities see Planning for regional growth.

Water education resources

We would like people to understand the importance of water treatment and the journey water takes from rainfall to their tap. In addition to this website we have printed material available on request.

Greater Wellington has recently commissioned a new water education resource - Turning on the tap.  Turning on the tap helps students to understand where their tap water comes from and make informed decisions about how they use it.  It provides an integrated unit of work for Year 5-8 students with content that is particularly relevant for schools in the Wellington region.  For more information about our new resource visit www.gw.govt.nz/turning-on-the-tap.

Organised groups are welcome to visit one of our treatment plants, weekdays by arrangement, for a guided tour to see the treatment process in action and learn more about the region's water supply. Tours are provided free of charge. For more information contact info@gw.govt.nz

Our environmental education team has also developed 'Take Action for Water',  a resource that aims to provide students with the knowledge and skills to make informed environmental decisions in daily life. It investigates the relationships between the living parts of the ecosystem and the impact we have on it. It is aimed at year 5-8 students and has activities and resources for a school term.