Check the latest nitrate measurements in your drinking water.

The map is based on an analysis conducted by Greenpeace at the end of 2025, using national data from tests of drinking water samples taken from general water supplies.

The national data comes from the Jupiter database at GEUS, the National Geological Survey for Denmark and Greenland, which is a national database where water suppliers must report their findings.

We have presented Greenpeace’s analysis to GEUS, which generally follows the same approach in its national assessments—for example, in mapping the hardness of drinking water. GEUS emphasizes that data for some areas may be outdated or imprecise and therefore advises contacting your local water utility if you need an accurate estimate of the nitrate content in your specific drinking water.

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