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Benchmarking data published by Water New Zealand as part of their 2018/19 National Performance Review showed that capital expenditure on three waters assets in the Wellington region is well below the average of the expenditure on networks in most other major centres, and for the wastewater network, expenditure was the lowest out of the seven large networks in the review.
The supply of water to the Wellington region is potentially vulnerable to significant disruption in the event of failures caused by a major earthquake. An application in 2017 by Wellington Water for an easement for a storage reservoir referenced a 2009 study conducted by GNS Science of possible earthquake damage to the water network. This study ...
Wellington Water manages the water supply for Wellington and the Hutt Valley. The Waiwhetu aquifer provides water to 150,000 people in Wellington and Hutt City. [8] This is around 40 percent of the Wellington region's annual water supply, and up to 70 percent in summer months.
However, Water New Zealand, the industry association that represents 1900 water engineers and specialists, advocates for chlorination of all public water supplies. [42] Water supplies in New Zealand generally have low concentrations of naturally-occurring fluoride, at levels that are insufficient to promote good dental health.
Wellington Water Limited is an infrastructure asset management company that manages the drinking water, wastewater and stormwater services of five councils in the Wellington Region of New Zealand. Ownership and governance
In 1995 Wellington City Council contracted British company Anglian Water International to provide a sewage treatment plant for Wellington at Moa Point, at a cost of $149 million. [15] The facility opened officially in September 1998. [16] The treatment process has several steps: liquid is screened to remove solids, then goes through settling tanks.
In 2003, a report on the state of the environment published by Greater Wellington Regional Council listed Waiwhetū Stream as one of the five most polluted streams in the region. [35] In July 2021, the stream was polluted with the discharge of untreated sewage from pumping stations for a short period following exceptionally heavy rainfall. [36]
This irrigation diversion race is the source of the water for the Highbank Power Station. When agricultural demand for water is low the water is used by the station to generate electricity, this is typically during the winter months. [7] Work began in the early 1940s, starting with the construction of an access road. [8]