Collegeville, PA Radon Levels

Q: What EPA Radon Zone is Collegeville in?

Collegeville is in Montgomery County, EPA Zone 1.

Q: How much does radon mitigation cost in Collegeville?

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

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

Collegeville, PA Radon Facts

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

County Montgomery County, PA

Zip Code 19426

Located in Montgomery County within the Philadelphia Metro area, Collegeville sits in Pennsylvania's Piedmont region where granite and schist bedrock contribute to the state's elevated radon potential. Testing data for zip code 19426 is currently limited, though Pennsylvania's statewide radon risk makes individual home testing essential. The area's mix of older homes and newer suburban development means radon levels can vary significantly between neighboring properties.

8.41

pCi/L area average

Above EPA Action Level

Montgomery County average: 8.41 pCi/L, based on 17 user-submitted tests across 16 cities in the county. No homeowner readings have been submitted for Collegeville 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+

Collegeville, 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 Collegeville, PA

No homeowner tests have been submitted for Collegeville 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
King Of Prussia	7.4 mi	7.00 pCi/L	1
Lansdale	8.1 mi	3.00 pCi/L	1
Wayne	9.2 mi	5.00 pCi/L	1
Hatfield	9.5 mi	6.00 pCi/L	1
North Wales	9.7 mi	7.00 pCi/L	1
Pottstown	11.1 mi	7.00 pCi/L	1
Gilbertsville	11.5 mi	5.00 pCi/L	1
Ambler	11.7 mi	4.00 pCi/L	1

Montgomery County Radon Profile

Because of its underlying geology, Montgomery County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 16 cities in Montgomery County average 8.41 pCi/L across 17 tests — 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 Montgomery County home regardless of zone or a neighbor's results.

Radon FAQ for Collegeville, PA

What EPA Radon Zone is Collegeville in?

Collegeville and the 19426 zip code are in Montgomery 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 Collegeville?

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

Radon mitigation in Collegeville 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 Collegeville?

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.