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Programme overview

Regional and city councils monitor recreational water quality to identify risks to public health from disease-causing organisms and toxic algae. People can then make informed decisions about where, when, and how they use rivers and the marine environment for recreation.


Monitoring network

The map below shows the monitoring sites coloured by the proportion of days predicted as suitable for swimming, based on an indicator bacteria ‘nowcast’ criteria model approach implemented in December 2018.

Scroll/zoom on the map to find areas of interest. Hover/click on a coloured site to see more information. Use the seasons toggle in the top right to compare winter vs summer seasons.


Guide to the site

This online reporting tool provides the results of the field surveillance monitoring data up to 30 June 2020 for:

See methods and resources for more details on sampling methodology and useful recreation water quality links.


The report may be cited as:

GWRC 2020. Recreational water quality annual report 2019/20. Greater Wellington Region Council. Available at: https://www.gw.govt.nz/annual-monitoring-reports/2020/recreational-water-quality/index.html