Regulatory
Pennsylvania Radon Mitigation Requirements
Pennsylvania regulates radon services through a certification program rather than a trade license. This page explains the structure of that program at a level a homeowner can use, and points to the official sources for every specific requirement.
How the program is structured
Pennsylvania's radon certification requirements come from the Commonwealth's Radon Certification Act and the regulations at 25 Pa. Code Chapter 240, administered by the Department of Environmental Protection's Radon Division.
The core principle: persons and firms who perform radon testing, mitigation or laboratory services for others are generally required to be certified by DEP, subject to the exemptions set out in the Act and the regulations.
Categories of certification
| Category | Covers |
|---|---|
| Radon testing | Measuring radon in buildings for others. |
| Radon mitigation | Designing and installing systems to reduce radon for others. |
| Radon laboratory | Analysing radon detection devices. |
Where current DEP guidance distinguishes certification held by an individual from certification held by a firm, both can be relevant: the company you contract with and the person who does the work are not always the same certification record. Check current DEP resources for how the distinction applies to your situation.
Exemptions exist — do not assume a blanket prohibition
Standards the work is performed to
Beyond who may perform the work, there is the question of how it must be performed. Consensus standards for radon testing and mitigation exist separately for one- and two-family dwellings, for multifamily buildings, and for schools and large buildings.
Which standard governs a given project depends on the building category and on what the applicable jurisdiction references. Confirm this with your certified professional and with current official sources rather than assuming the residential standard applies everywhere.
What we deliberately do not publish here
- Fee amounts for certification or renewal.
- Certification periods or renewal intervals.
- Penalty amounts or enforcement thresholds.
- The precise scope of each statutory exemption.
- Any claim that a "license" is issued, where the Commonwealth uses certification.
These change, and a stale number on a third-party website is worse than no number. Take them from the current official sources linked on this page.
What a homeowner should actually do
- Confirm the individual or firm appears on the official DEP listing, with current status.
- Confirm the certification category matches the work — testing, mitigation, or both.
- Ask for the certification identifier and check it against the official source yourself.
- Keep the installation and testing documentation for the property file.
Request radon mitigation quotes
Share your test result, foundation type and project details. We pass your request to independent radon professionals — we do not perform the work ourselves.