1 credentialed Iowa radon professional serving Shellsburg, 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.
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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.
Source: Iowa Admin. Code 641 ch. 44 (adopted 2026); Iowa HHS radon credentialing. Checked 2026-11-05.EPA recommends fixing a home at 4 pCi/L or higher and suggests considering a fix between 2 and 4 pCi/L. What your test number means →
Source: EPA, What is EPA's action level for radon?. Checked 2026-11-05.Straight-line miles between Census place points, not driving distance. Source: U.S. Census Bureau, 2023 Gazetteer Files (Places).