Private Well Water Testing in Iowa

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

Iowa private-well risk summary

Counties covered

Iowa counties with modeled risk data.

People on private wells

area estimate

501,221

estimated across covered Iowa counties.

Average arsenic risk

area estimate

13%

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

Iowa counties

Find a Iowa-certified testing lab

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

Iowa certified labs

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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