3 credentialed Iowa radon professionals serving Iowa City, sourced from the Iowa HHS credential rosters and cross-checked against each company's own site. Filter by what you actually need — a mitigation install, a test, or both.
Local rule · landlords
Iowa City has a rental radon-testing ordinance
Iowa City Municipal Code §17-5-18 requires radon testing for single-family and duplex rental units (owner-occupied homes are not covered). Testing must be done by a state-certified radon measurement specialist, and results are reported to the City. If a test comes back at or above 4.0 pCi/L, the code requires mitigation within 90 days. Units must be retested every 8 years — every 4 years if a bedroom is in the basement.
Sourced from the municipal code text and a city bulletin describing it; the two sources we found disagree on the exact date the requirement took effect, so we're not stating one here. Landlords should confirm current requirements and any compliance deadline directly with the City of Iowa City rather than relying on this note. See Iowa City CSD school radon test results →
Credential check: every Iowa City-based contractor below is on an Iowa HHS radon roster (number and roster date on each card). That means they're allowed to do the work, not that they do it well. Check an Iowa license yourself →
Yes. Iowa HHS certifies radon testers (measurement specialists, numbers starting RNTST) and credentials installers (mitigation specialists, numbers starting RNMIT). Mitigation rules in effect since July 1, 2026 require national ANSI/AARST installation standards and a level below 4 pCi/L after the system is installed.