Smithfield, PA Radon Levels

Q: What EPA Radon Zone is Smithfield in?

Smithfield is in Fayette County, EPA Zone 2.

Q: How much does radon mitigation cost in Smithfield?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Check local Smithfield radon levels and find certified testing and mitigation professionals to keep your home safe

Smithfield, PA Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Fayette County, PA

Zip Code 15478

Situated in Fayette County within the Pittsburgh Metro area, Smithfield sits on Pennsylvanian-age coal measures and shale that characterize southwestern Pennsylvania's geology and contribute to moderate radon potential. The area's housing includes both historic mining-era construction and newer development, typically featuring full basements common throughout Appalachian Pennsylvania. Given the lack of recent testing data for zip code 15478, local homeowners should prioritize radon testing to ensure safe indoor air quality in this EPA Zone 2 region.

4.00

pCi/L area average

Above EPA Action Level

Fayette County average: 4.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Smithfield itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Smithfield, PA Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

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Radon Readings Near Smithfield, PA

No homeowner tests have been submitted for Smithfield yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Uniontown	8.1 mi	4.00 pCi/L	1
Confluence	24.2 mi	9.00 pCi/L	1
West Newton	28.8 mi	6.00 pCi/L	1
Mount Pleasant	30.8 mi	7.00 pCi/L	1
Washington	35.2 mi	5.00 pCi/L	1
South Park	35.9 mi	7.00 pCi/L	2
Irwin	36.7 mi	10.00 pCi/L	1
Canonsburg	38.0 mi	8.33 pCi/L	3

Fayette County Radon Profile

Fayette County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. Homeowner-submitted tests from 1 city in Fayette County average 4.00 pCi/L across 1 test — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Fayette County.

Radon FAQ for Smithfield, PA

What EPA Radon Zone is Smithfield in?

Smithfield and the 15478 zip code are in Fayette County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Smithfield?

No homeowner radon tests have been submitted for Smithfield yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Fayette County average—are the best available indicator of local conditions until Smithfield homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Smithfield?

Radon mitigation in Smithfield typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Smithfield?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.