Grand Valley, PA Radon Levels

Q: What EPA Radon Zone is Grand Valley in?

Grand Valley is in Warren County, EPA Zone 2.

Q: How much does radon mitigation cost in Grand Valley?

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

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

Grand Valley, PA Radon Facts

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

County Warren County, PA

Zip Code 16420

Found in Warren County in northwestern Pennsylvania, Grand Valley sits in EPA Zone 2 where sedimentary bedrock and glacial deposits create moderate radon potential. Testing data is currently limited for the 16420 zip code area, making individual home radon testing important for residents. The region's mix of older rural homes with basements and varying foundation types can influence how radon accumulates in different properties.

19.00

pCi/L area average

Above EPA Action Level

Warren County average: 19.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Grand Valley 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+

Grand Valley, PA Radon Mitigation

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

Need Radon Mitigation or Testing in Grand Valley?

100% Free, No-Obligation Quotes
Matches You with State-Licensed Warren County Pros

1-800-299-3578 814-275-6476 (local) Toll-free · Mon–Fri 8am–6pm ET

Radon Readings Near Grand Valley, PA

No homeowner tests have been submitted for Grand Valley 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
Warren	21.8 mi	19.00 pCi/L	1
Fryburg	23.5 mi	4.00 pCi/L	1
Franklin	24.9 mi	9.00 pCi/L	1
Cranberry	26.4 mi	1.00 pCi/L	1
Saegertown	31.0 mi	9.00 pCi/L	1
Conneaut Lake	39.7 mi	7.00 pCi/L	1
Parker	41.8 mi	20.00 pCi/L	1
Brookville	44.1 mi	8.00 pCi/L	3

Warren County Radon Profile

EPA mapping assigns Warren County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 1 city in Warren County average 19.00 pCi/L across 1 test — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Warren County home regardless of zone or a neighbor's results.

Radon FAQ for Grand Valley, PA

What EPA Radon Zone is Grand Valley in?

Grand Valley and the 16420 zip code are in Warren 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 Grand Valley?

No homeowner radon tests have been submitted for Grand Valley yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Warren County average—are the best available indicator of local conditions until Grand Valley 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 Grand Valley?

Radon mitigation in Grand Valley 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 Grand Valley?

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.