Horsham, PA Radon Mitigation and Testing
Part of the Philadelphia Metro area in Montgomery County, Horsham shows extremely high radon activity with a reading of 20.0 pCi/L from recent testing. This level far exceeds the EPA's 4.0 pCi/L action level, reflecting the area's complex geology of Triassic-Jurassic bedrock formations known for elevated radon production. Residents in ZIP code 19044 should prioritize immediate radon testing and mitigation, particularly given the prevalence of basement-equipped homes in this suburban Philadelphia community.
Based on 1 user-submitted radon test for homes in Horsham, PA. The EPA recommends taking action at or above 4.0 pCi/L.
Horsham, PA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Horsham, PA Radon Testing
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Horsham, Pennsylvania Radon Levels
User-submitted radon test readings from homes in the Horsham area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 20 pCi/L | Horsham, PA | 0-20 Years | Full Basement | Oct 2024 |
Have a radon test result for Horsham? Submit your reading to help other homeowners.
Horsham Radon Facts
Key details about the radon risk profile for Horsham and the 19044 zip code area.
Horsham and the 19044 zip code are located in Montgomery 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 Horsham, PA
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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 |