Avondale, PA Radon Levels

Q: What EPA Radon Zone is Avondale in?

Avondale is in Chester County, EPA Zone 1.

Q: How much does radon mitigation cost in Avondale?

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

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

Avondale, PA Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Chester County, PA

Zip Code 19311

Found in Chester County within the Philadelphia Metro region, Avondale sits on crystalline bedrock and residual soils that characterize southeastern Pennsylvania's Piedmont geology. Limited testing data for zip code 19311 emphasizes the need for individual radon assessment in this historic area. The community's mix of older stone construction and newer developments requires tailored approaches to radon testing and potential mitigation.

9.00

pCi/L area average

Above EPA Action Level

Chester County average: 9.00 pCi/L, based on 10 user-submitted tests across 8 cities in the county. No homeowner readings have been submitted for Avondale 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+

Avondale, 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 Avondale, PA

No homeowner tests have been submitted for Avondale 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
Landenberg	3.7 mi	9.00 pCi/L	1
Kennett Square	4.3 mi	9.00 pCi/L	1
Oxford	11.6 mi	4.00 pCi/L	1
West Chester	13.6 mi	6.67 pCi/L	3
Downingtown	13.7 mi	20.00 pCi/L	1
Garnet Valley	14.4 mi	7.00 pCi/L	1
Glen Mills	15.0 mi	3.00 pCi/L	1
Nottingham	15.2 mi	7.00 pCi/L	1

Chester County Radon Profile

The bedrock and soils beneath Chester County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 8 cities in Chester County average 9.00 pCi/L across 10 tests — 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 Chester County.

Radon FAQ for Avondale, PA

What EPA Radon Zone is Avondale in?

Avondale and the 19311 zip code are in Chester County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

Why are radon readings shown from areas near Avondale?

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

Radon mitigation in Avondale 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 Avondale?

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.