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(833) 445-5776✓ Verified October 4, 2026 on the official state list dated October 1, 2026, double-checked against a second state list.
Radon in Somerset County, Pennsylvania
Last updated
Zone 2 Moderate potential. Predicted average indoor screening level from 2 to 4 pCi/L.
Somerset County is one of 17 Pennsylvania counties (out of 67) that EPA places in Zone 2. 38 ZIP codes reach into the county, 30 of them entirely. We list 1 radon professional for Somerset County, each checked against the state’s official list.
What the zone means for a Somerset County home
Zone 2 means EPA predicted a county-wide average between 2 and 4 pCi/L. That is below EPA's action level on average, but plenty of individual Somerset County homes will be above 4 pCi/L, and EPA suggests considering a fix between 2 and 4 pCi/L too.
A short-term test kit costs little and takes two to seven days. If your result is 4 pCi/L or higher, EPA recommends a follow-up test and, if it is confirmed, a mitigation system, which typically uses a pipe and fan to pull soil gas from under the foundation and vent it above the roof. Check a result with the level calculator and plan your next step with the follow-up planner.
Radon professionals for Somerset County
Pennsylvania listings show the county where the firm is based. Many firms work in neighboring counties too. Listings are free. Featured listings are paid placements and are labelled.
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Get radon quotes from certified pros in Somerset County
Tell us what you need and we will try to connect you with up to three state-certified or licensed radon professionals who work in your area. It is free and there is no obligation.
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ZIP codes in Somerset County
Open a ZIP to see every county it touches. Where a ZIP crosses a county line, the percentage is the share of its land area inside Somerset County.
1541115424 (75%)15501 (95%)1550215510155201553015531 (87%)15532155381554015541155421554415545 (42%)155461554715551155521555515557 (99%)1555815560155611556215563155641556515622 (35%)15905 (41%)1592415926159281593515936159371595315963 (74%)
Pennsylvania radon program
EPA lists PA Dept. of Environmental Protection, Bureau of Radiation Protection (phone 717-783-3594) as the state contact. State programs can tell you about local test results, discounted kits, disclosure rules for home sales and credentialed professionals. Website: www.dep.pa.gov/Business/RadiationProtection/RadonDivision/Pages/Radon-in-the-home.aspx.
Back to all Pennsylvania counties.
Frequently asked questions
What is the EPA radon zone for Somerset County, Pennsylvania?
EPA's Map of Radon Zones puts Somerset County in Zone 2 (moderate potential): Predicted average indoor screening level from 2 to 4 pCi/L.
Do I need to test for radon in Somerset County if the zone is low?
Yes. EPA says the zone map should not be used to decide whether a single home needs testing. Homes with high radon are found in every zone, and neighboring homes can test very differently. Testing is cheap and the only way to know your level.
How do I find a certified radon professional in Somerset County?
We list 1 state-certified radon professional for Somerset County on this page, each checked against the state's official list. You can also ask for free quotes with the form on this page.
How many ZIP codes are in Somerset County?
38 ZIP codes have at least part of their land area in Somerset County, based on the U.S. Census Bureau's 2020 ZIP Code Tabulation Area to county relationship file.
Free checklist · PDF
Radon Test Checklist
A one-page, step-by-step checklist for running a home radon test right the first time, and what to do with the number.
- Short-term vs. long-term test: which to use
- Closed-house conditions and where to place the kit
- What 2, 4 and 8 pCi/L mean and when to fix
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