Swimming water quality data

Swimming Water Quality for our most popular bathing spots.

Water quality is regularly monitored at popular swimming and recreational water sport locations within the Tasman District. This page displays sampling results for each of the monitored sites.

The risk of catching an infectious disease from swimming in clear, clean water is usually low. However, after rainfall, contamination occurs through runoff into waterways and there is an increased chance that you may catch a gut, ear, skin or respiratory infection. The Tasman District Council and Nelson Marlborough District Health Board Public Health Service advise that after rainfall, it is best not to swim in discoloured water, especially for at least the first 24 hours and preferably 36 hours to minimise the risk of exposure to harmful bacteria.

How to interpret the results

Points on the map use a three-tier warning system to show health risk, based on Ministry for the Environment and Ministry of Health guidelines.

Response Sample Result
Beaches Rivers  
 <140 Enterococci per 100 mL <260 E.coli per 100 mL  Indicates a minimal health risk for recreational activities involving contact with water. 
 140-280 Enterococci per 100 mL  260-550 E.coli per 100 ml Indicates the health risk for recreational activites involving contact with water may have increased. This acts as a trigger and the Council collects more frequent samples.
 >280 Enterococci per 100 mL  >550 E.coli per 100 mL Indicates any contact with the water could present a significant health risk.
Note that not all sites are monitored each year. If this is the case, sites may display no data or may have old graphs.


Land, Air, Water Aotearoa - LAWA

The LAWA website is a collaboration between New Zealand’s 16 regional and unitary councils, the Ministry for the Environment (MFE), Cawthron Institute and Massey University. It provides all of the country’s air and water quality monitoring in one place and in a common, easy to understand format.

More information

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