8 Lake 1 Land 26 Long Sea Outfall 22 Near Shore Outfall 7 River/stream/drain 62 Wetland 4 Stormwater In its summary of the findings from the National Performance Review 2018–19, Water New Zealand observed that management of stormwater quality is not yet widespread. Stormwater quality monitoring programmes and/or catchment management plans are in place for just over half the Review's participants. Consents for stormwater discharge are even less widespread. Only eight participants had all stormwater discharges consented. Most commonly, participants had consents for less than 10% of the network, and six participants had no stormwater discharge consents whatsoever. In 2018, the Auditor-General reviewed the management of stormwater by three councils, to gain insights into how these councils were managing the risk of flooding in their communities. The councils reviewed were Dunedin City Council, Porirua City Council, and Thames-Coromandel District Council. One of the main conclusions was that the three councils had a reactive approach to understanding flood risk, by relying mostly on the information collected after a flood. The lack of forecasting could lead to a poor understanding of the risk and cost of future events, and inadequate preparation. The review also noted that the three councils were spending less than the annual depreciation amount on re-investment in stormwater systems, and that under-investment could lead to stormwater systems failing to contain and minimise flooding. In the summary of findings, the Auditor-General noted that all councils face challenges when managing their stormwater systems, including ageing infrastructure, limited capacity, managing costs to the community, and having the right people and skills in their organisations. The main recommendations concern the need for improved investment decision making, based upon better information about flood risks, and the performance and capacity of stormwater assets. See also Water in New Zealand List of water supply and sanitation by country References External links Drinking-water in New Zealand at the Ministry of Health Water New Zealand Water in New Zealand Infrastructure in New Zealand Drinking water Sanitation