River water quality for contact recreation
Why we monitor river water quality for contact recreation
Waikato Regional Council routinely monitors a representative cross-section of regional rivers and streams to assess the suitability of water quality for human water recreation activities, such as swimming, kayaking and water-skiing.
Sometimes ‘bad bugs’ from human and animal faeces – micro-organisms such as protozoans, bacteria and viruses – can get into waterways.
These ‘bad bugs’ can cause illness when people are exposed to them. Other contaminants such as fine silts and clays reduce the clarity of the water, making it difficult to see and avoid submerged hazards like snags.
We monitor 10 sites on the Waikato River and 105 sites on other rivers and streams throughout the region. You can see more about those sites and their results, here.
An average ‘pass rate’ for two water quality measures (faecal bacteria levels and water clarity) is determined for each site.
River water quality for contact recreation is good in some parts of the region (for example, the upper Waikato River, tributaries of Lake Taupō, and in the Coromandel). In the lowland areas, river water quality is not so good (for example, Hauraki and the lowland tributaries of the Waikato River).
This largely reflects the greater intensity of land use in the lowland parts of the region, with higher levels of faecal bacteria and fine silts, and highlights the impact of non-point sources of contamination such as runoff from agricultural land and urban areas.
The Waikato Regional Council has begun to assess the relative importance of various point and non-point sources of contamination using this information together with our resource consents database.
When this indicator is updated
This indicator is updated annually.
Contact at Waikato Regional Council
Water Quality Scientist - Science and Strategy Directorate
Updated July 2019