Watercare Services Limited is New Zealand's largest company in the water and wastewater industry. It supplies bulk water that reaches around one-third of New Zealand’s population who live in the greater Auckland area.
Despite serving 1.3 million consumers, Watercare has only six customers – the retail water companies who on-sell the water supplied by Watercare to the general public.
Watercare, which is jointly owned by the six city and district councils in the greater Auckland area, draws water from 12 sources, treats it to A-grade quality and supplies it via a network of 467 kilometres of treated water mains.
Watercare also operates a regional wastewater network, receiving wastewater from four of the region’s councils: Auckland, Waitakere, Manukau and Papakura. All wastewater passes through the Mangere Wastewater Treatment Plant – an average of 288,000,000 litres per day.
The treatment plant is state of the art, having been upgraded as recently as 2003. Wastewater passes through primary, secondary and tertiary treatment processes on land, which separates liquid from solid matter. The treated water is then discharged into the Manukau Harbour. Beyond the small mixing area surrounding the discharge point, the water quality is sufficient to allow contact recreation such as swimming and shellfish gathering.
The solid matter that remains at the end of the treatment process is called treated biosolids. Watercare is currently using treated biosolids to restore an area of land that is close to the plant.
This article is based on information current in 2008.
Company Representative Organisation
Watercare Services Limited
Private Bag 92 521