Folsom, PA Radon Levels

Q: What EPA Radon Zone is Folsom in?

Folsom is in Delaware County, EPA Zone 1.

Q: Why are radon readings shown from areas near Folsom?

No homeowner radon tests have been submitted for Folsom yet, so readings from the closest cities and the Delaware County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Folsom?

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

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

Folsom, PA Radon Facts

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

County Delaware County, PA

Zip Code 19033

Part of Delaware County in the Philadelphia Metro area, Folsom sits within southeastern Pennsylvania's complex geological zone where ancient metamorphic rocks can influence radon production. Current testing data is limited for this community, though Pennsylvania's well-documented radon concerns make individual home testing strongly recommended. The area's established residential neighborhoods feature predominantly older homes with full basements, creating enclosed below-grade spaces where radon typically accumulates.

5.59

pCi/L area average

Above EPA Action Level

Delaware County average: 5.59 pCi/L, based on 22 user-submitted tests across 13 cities in the county. No homeowner readings have been submitted for Folsom 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+

Folsom, 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 Folsom, PA

No homeowner tests have been submitted for Folsom 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
Swarthmore	1.0 mi	5.25 pCi/L	4
Morton	1.2 mi	4.00 pCi/L	1
Springfield	2.7 mi	5.67 pCi/L	3
Clifton Heights	3.1 mi	5.00 pCi/L	1
Media	4.2 mi	7.00 pCi/L	2
Drexel Hill	4.4 mi	2.50 pCi/L	2
Lansdowne	4.8 mi	4.00 pCi/L	1
Aston	5.8 mi	4.00 pCi/L	1

Delaware County Radon Profile

The bedrock and soils beneath Delaware 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 13 cities in Delaware County average 5.59 pCi/L across 22 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 Delaware County.

Radon FAQ for Folsom, PA

What EPA Radon Zone is Folsom in?

Folsom and the 19033 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.

Why are radon readings shown from areas near Folsom?

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

Radon mitigation in Folsom 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 Folsom?

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.