Darby, PA Radon Mitigation and Testing

Q: What EPA Radon Zone is Darby in?

Darby is in Delaware County, EPA Zone 1.

Q: How much does radon mitigation cost in Darby?

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

Delaware County

EPA Zone 1

Suburban Delaware County within the Philadelphia Metro area sits on coastal plain sediments and fractured bedrock that place this region in EPA Zone 1 for highest radon potential. The community's mix of mid-century suburban homes typically features basements where radon can accumulate effectively. While specific testing data for zip code 19023 is currently limited, the geological conditions and housing characteristics strongly suggest residents should test their properties for radon exposure.

Darby, PA Radon Mitigation

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

Darby, PA Radon Testing

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

Darby Radon Facts

Key details about the radon risk profile for Darby and the 19023 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Delaware County, PA

Zip Code

19023

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Darby and the 19023 zip code are located in Delaware 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 Darby, PA

What EPA Radon Zone is Darby in?

Darby and the 19023 zip code are in Delaware 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 Darby?

Radon mitigation in Darby 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 Darby?

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