Devon, PA Radon Mitigation and Testing

Q: What EPA Radon Zone is Devon in?

Devon is in Chester County, EPA Zone 1.

Q: How much does radon mitigation cost in Devon?

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

Chester County

EPA Zone 1

Nestled in Chester County as part of the Philadelphia metropolitan region, Devon sits on Piedmont geology known for moderate-to-high radon potential throughout southeastern Pennsylvania. Although specific testing data for this 19333 zip code area is currently limited, the regional geological context strongly encourages radon testing. Homeowners should test regardless of home age or foundation type given the area's geological characteristics.

Devon, PA Radon Mitigation

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

Devon, PA Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Devon Radon Facts

Key details about the radon risk profile for Devon and the 19333 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Chester County, PA

Zip Code

19333

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Devon and the 19333 zip code are located in Chester County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Devon, PA

What EPA Radon Zone is Devon in?

Devon and the 19333 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.

How much does radon mitigation cost in Devon?

Radon mitigation in Devon 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 Devon?

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.

Most Active Radon Markets in Pennsylvania

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
State College	10.00 pCi/L	14
Chambersburg	10.14 pCi/L	7
Easton	12.33 pCi/L	6
Butler	12.40 pCi/L	5
Dingmans Ferry	5.80 pCi/L	5
Hanover	14.00 pCi/L	4
Mechanicsburg	13.75 pCi/L	4
Greenville	10.75 pCi/L	4
Pittsburgh	9.25 pCi/L	4
Albrightsville	9.00 pCi/L	4
Philadelphia	8.00 pCi/L	4
Lackawaxen	15.33 pCi/L	3
York	11.67 pCi/L	3
Elizabethtown	9.67 pCi/L	3
Johnstown	7.33 pCi/L	3
West Chester	6.67 pCi/L	3
Danville	5.67 pCi/L	3
Springfield	5.67 pCi/L	3
East Stroudsburg	5.00 pCi/L	3
Langhorne	4.67 pCi/L	3