Water quality

Find out how we monitor river water quality.

The quality of water in our rivers is defined by how the physical, chemical and biological condition of the water and channel meets the needs of people and ecosystems. These conditions are influenced primarily by the climate, source of flow, geology and land use around a river.

Some of the most important indicators of water quality are:

  • Faecal bacteria concentrations (the level of disease-causing organisms)
  • The quantity of fine sediment (mud, silt and sand less than 2mm)
  • Dissolved oxygen concentrations
  • Nutrient concentrations (particularly nitrogen and phosphorus)
  • Water temperature
  • Water clarity

We are continuously monitoring the quality of the water in our region. Reports are published periodically.

All environmental reports are available:


Why we measure water quality
River water quality in Tasman
Water quality glossary

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