Private Well Water Testing in North Dakota

County-by-county USGS area-risk estimates for private wells across North Dakota — arsenic exceedance probability and private-well population — plus how to test your own well at a North Dakota-certified laboratory.

North Dakota private-well risk summary

Counties covered

North Dakota counties with modeled risk data.

People on private wells

area estimate

95,409

estimated across covered North Dakota counties.

Average arsenic risk

area estimate

average modeled chance a well exceeds 10 µg/L arsenic across covered counties.

North Dakota counties

Find a North Dakota-certified testing lab

Get your well tested at a North Dakota-certified laboratory. We list certification programs by state.

North Dakota certified labs

Already tested your well? Get a free plain-English reading

Upload your well water lab report (PDF or a photo) and our team will email you a full, plain-English reading of every result — free. Educational only, never medical advice.

Your upload also helps us keep local water data accurate — we only ever share anonymized, area-level summaries.

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These figures are USGS area estimates: statistical groundwater models describing how likely elevated contaminant levels are across a county. They are not designed to predict the concentration in any single well. Only testing your own well reveals its water quality.

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By TapWaterData Editorial