Private Well Water Testing in District of Columbia
County-by-county USGS area-risk estimates for private wells across District of Columbia — arsenic exceedance probability and private-well population — plus how to test your own well at a District of Columbia-certified laboratory.
District of Columbia private-well risk summary
Counties covered
1
District of Columbia counties with modeled risk data.
People on private wells
area estimate576
estimated across covered District of Columbia counties.
Average arsenic risk
area estimate3%
average modeled chance a well exceeds 10 µg/L arsenic across covered counties.
District of Columbia counties
Find a District of Columbia-certified testing lab
Get your well tested at a District of Columbia-certified laboratory. We list certification programs by state.
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.
By TapWaterData Editorial
Stay Informed About Your Water Quality
Get EPA reports, filter recommendations, and safety alerts for your area.
Join 10,000+ people protecting their families. Unsubscribe anytime.