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Groundwater Quality

In New Zealand, groundwater is a valuable supply of fresh water for drinking water, irrigation and industry, and many of our streams and lakes.

New Zealand’s Regional and Unitary Councils regularly monitor groundwater quality in wells across the country. Here, you can explore the data collected from these wells and see how groundwater quality has changed over time. Learn more about what groundwater is and how this vital resource is monitored through our factsheets.

Select an indicator:

  • Chloride
  • Dissolved reactive phosphorus
  • E. coli
  • Electrical conductivity
  • Nitrate nitrogen

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