Gwynedd, PA Radon Levels
Check local Gwynedd radon levels and find certified testing and mitigation professionals to keep your home safe
Gwynedd, PA Radon Facts
Suburban Philadelphia community Gwynedd in Montgomery County sits on Pennsylvania's Piedmont region geology, where schist and gneiss bedrock can create significant radon potential throughout the Philadelphia Metro's 19436 zip code area. Testing data remains limited for this location, though southeastern Pennsylvania often produces elevated radon readings requiring mitigation. Most area homes feature basements typical of mid-Atlantic suburban construction.
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 Gwynedd itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.
Gwynedd, PA Radon Mitigation
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Radon Readings Near Gwynedd, PA
No homeowner tests have been submitted for Gwynedd yet, so the closest user-submitted readings from neighboring communities are shown below. Radon varies by home — testing is the only way to know your level.
| Radon Level | City | Distance | Home Age | Foundation | Submitted |
|---|---|---|---|---|---|
| 7 pCi/L | North Wales, PA | 1.0 mi | 0-20 Years | Partial Basement | Feb 2020 |
| 4 pCi/L | Ambler, PA | 2.4 mi | 51-99 Years | Full Basement | Jun 2017 |
| 3 pCi/L | Lansdale, PA | 3.4 mi | 21-50 Years | Full Basement | Jul 2022 |
| 20 pCi/L | Horsham, PA | 5.6 mi | 0-20 Years | Full Basement | Oct 2024 |
| 6 pCi/L | Hatfield, PA | 5.8 mi | 0-20 Years | No Basement/All Slab | Mar 2025 |
| 7 pCi/L | Glenside, PA | 8.1 mi | 100+ Years | Full Basement | Mar 2019 |
| 7 pCi/L | Warminster, PA | 8.5 mi | 51-99 Years | Full Basement | Jan 2026 |
| 6 pCi/L | Warminster, PA | 8.5 mi | 21-50 Years | Full Basement | Mar 2017 |
Readings are drawn from the nearest cities with submitted data. Have a result for Gwynedd? Submit your reading to help your neighbors.
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 Gwynedd, PA
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Radon Levels Near Gwynedd, PA
User-submitted radon levels from the cities closest to Gwynedd with recorded test data. Explore nearby communities to compare local readings.
| City | Distance | Avg User Level | Submissions |
|---|---|---|---|
| North Wales | 1.0 mi | 7.00 pCi/L | 1 |
| Ambler | 2.4 mi | 4.00 pCi/L | 1 |
| Lansdale | 3.4 mi | 3.00 pCi/L | 1 |
| Horsham | 5.6 mi | 20.00 pCi/L | 1 |
| Hatfield | 5.8 mi | 6.00 pCi/L | 1 |
| Glenside | 8.1 mi | 7.00 pCi/L | 1 |
| Warminster | 8.5 mi | 11.00 pCi/L | 3 |
| Abington | 9.0 mi | 8.00 pCi/L | 1 |