Auckland's water supply
We’re fortunate to have a diverse range of water sources – dams, rivers and aquifers. This means we can balance production rates at our treatment plants to ensure we’re making the best use of the water we have available.
For example, if our small dams in the Waitākere Ranges are full and close to spilling, we maximise production at our Huia and Waitākere water treatment plants that treat water from these dams.
Our current water sources
At the moment, with Auckland still recovering from 2020's severe drought, we are minimising production at our Ardmore Water Treatment Plant, which treats water from our four Hūnua dams, and maximising production at our Waikato water treatment plants, where we treat water from the Waikato River. This eases the pressure on our Hūnua dams, allowing them to fill up as much as possible when it rains.
The current water supply situation
Auckland’s water supply is currently stable. Stage one outdoor restrictions remain in place and will likely stay in place over summer. While our dam levels have not yet recovered from 2020's drought, we are in a better position this year thanks to the continued efforts of our customers to save water, and our work to bring online new water sources.
Since restrictions were put in place in May 2020 we have:
At the same time, Aucklanders have saved billions of litres of water. Ka pai!
- Completed the Pukekohe East reservoir, a key project enabling our Waikato Water Treatment Plant to treat up to 175 million litres a day (MLD)
- Completed the Waikato 50 plant in record time, taking our peak production from the Waikato River to 225 million litres a day
- Built a new Pukekohe Water Treatment Plant, which treats up to 5MLD
- Built the first stage of our Papakura Water Treatment Plant, which treats up to 6MLD
- Upgraded our Onehunga Water Treatment Plant, boosting treatment capacity by 4MLD
- Carried out acoustic leak detection on more than 5,500 kilometres of our water network to find and fix invisible leaks. This has saved an estimated 9MLD.