Free water testing is made eligible to all Johnson County households with a private well on their property. The program is available through the Grants-to-Counties (GTC) program. The GTC program was established in 1987 when legislature passed the Iowa Groundwater Protection Act to help prevent further contamination of one of Iowa’s most precious resources; our groundwater.

Water Well Sampling

All well water should be periodically sampled. How often you test your well water varies by the age of the well, and whether you experience water discoloration, unusual smells, and/or suspect contamination. You may contact Johnson County Public Health or the University of Iowa Hygienic Laboratory to purchase sample bottles.

Johnson County Public Health offers free water sampling to Johnson County residents. Call to make an appointment to have an Environmental Health Specialist take the water sample for you. This program is funded by the Grants to Counties Grant and only a limited number of samples are available free of charge each year.

If you have any questions or concerns about your well please contact an Environmental Health Specialist at Johnson County Public Health at 319-356-6040.

Iowa Statewide Well Water Survey
Making Sure Your Drinking Water is Safe
State Hygienic Lab at the University of Iowa


Water Treatment

Contamination & Treatment Options
Bacterial Contamination
Giardia & Crytosporidium
Iron Bacteria
Flood Cleanup
Emergency Disinfection
Shock Chlorinating & Disinfecting Wells
Well Maintenance & Management
Well Water & Home Treatment Systems
Source Water Protection
Iowa Regulations Governing the Sale & Marketing of Residential Water Treatment System
Iowa Regulations for Residential Water Treatment


Water Quality & Other Related Links

Water Quality and Conservation
American Water Works Association
EPA Consumer Confidence Reports on Drinking Water
EPA Region 7
IDPH Division of Environmental Health (IDPH)
IDNR Well Abandonment
Iowa Water Quality Bureau
Iowa Department of Natural Resources
Iowa Farm*A* Syst
Iowa Rural Water Association
Iowa Department of Public Health
Iowa Department of Inspections and Appeals
Iowa Geological Survey
Johnson County Soil & Water Conservation District - Conservation News
National Environmental Health Association
US Geological Survey of Johnson County Well Sites