Local data
Radon Levels in York County, PA by Town
The Pennsylvania DEP has recorded 81,840 basement radon tests in York County. 56.5% came in at or above the EPA action level of 4.0 pCi/L. The median was 4.9 pCi/L. Levels vary a lot by town, from a 3.0 pCi/L median in Wellsville to 8.9 in Felton and Windsor. The table below shows every York County town with at least 300 basement tests on record.
Source: Pennsylvania DEP, Radon Test Results (data.pa.gov), tests through July 2026. Retrieved September 30, 2026. These are tests reported to DEP by certified labs and testers, not a random sample of homes.
Basement radon test results by York County town
Towns are grouped by mailing address, so each town includes surrounding townships that share its post office. Click a column header to sort.
| York | 28,440 | 5.0 | 57.6% | 28.4% |
| Hanover | 9,977 | 4.0 | 50.3% | 24.9% |
| Dillsburg | 4,990 | 4.0 | 50.1% | 21.6% |
| Red Lion | 4,150 | 7.7 | 67.1% | 41.9% |
| Dover | 3,251 | 3.8 | 48.3% | 17.3% |
| Etters | 2,547 | 3.4 | 44.3% | 17.6% |
| Stewartstown | 2,504 | 7.3 | 64.4% | 42.5% |
| Spring Grove | 2,427 | 7.2 | 64.4% | 42.9% |
| New Freedom | 2,317 | 4.6 | 55.1% | 27.5% |
| Dallastown | 1,968 | 8.4 | 68.6% | 45.0% |
| Lewisberry | 1,831 | 3.7 | 47.8% | 18.6% |
| New Cumberland | 1,738 | 3.8 | 48.5% | 23.0% |
| Shrewsbury | 1,628 | 4.6 | 53.6% | 26.3% |
| Glen Rock | 1,543 | 6.3 | 63.5% | 37.3% |
| Seven Valleys | 1,408 | 8.0 | 64.0% | 43.2% |
| Mount Wolf | 1,075 | 5.2 | 58.6% | 35.6% |
| Wrightsville | 939 | 7.5 | 68.8% | 41.1% |
| York Haven | 899 | 3.3 | 43.7% | 15.5% |
| Manchester | 873 | 3.2 | 41.4% | 14.3% |
| Delta | 848 | 5.6 | 59.1% | 33.8% |
| Felton | 831 | 8.9 | 67.7% | 46.8% |
| Windsor | 763 | 8.9 | 68.0% | 46.3% |
| Camp Hill (York County portion) | 635 | 5.1 | 57.6% | 29.4% |
| Glenville | 541 | 7.5 | 62.5% | 42.5% |
| Jacobus | 486 | 7.5 | 65.6% | 40.3% |
| Fawn Grove | 412 | 7.4 | 65.8% | 40.8% |
| Wellsville | 368 | 3.0 | 38.6% | 12.5% |
| Thomasville | 356 | 4.8 | 56.7% | 27.0% |
| Airville | 348 | 8.7 | 70.4% | 45.1% |
Source: Pennsylvania DEP, Radon Test Results (data.pa.gov), tests through July 2026. Retrieved September 30, 2026. These are tests reported to DEP by certified labs and testers, not a random sample of homes.
What these numbers mean for your home
A town's median doesn't predict your house. In every town above, some homes tested low and some tested very high. These are tests reported to DEP, often during home sales, not a random sample. Use the table to understand local risk, then test your own home.
If your home tests high
Most York County homeowners who mitigate pay $935 to $1,320 (median $1,150, 701 DEP-reported systems, 2024–2026). See our guide to radon mitigation in York, PA for how it works and how to hire a certified mitigator.
Source: Pennsylvania DEP, Radon Mitigation System records (data.pa.gov), York County systems reported 2024–2026. Retrieved September 30, 2026.
Ask a question
Contact Us
York PA Radon Guide
17 E Market St., Suite C, York, PA 17401
Phone: 717-714-3297
Our team is based in downtown York, PA and helps local homeowners understand radon testing, mitigation, and hiring certified help. Always verify individual contractor certifications directly with the PA DEP.
Next steps for York, PA homeowners
- 1
Test if you have not already. A short-term kit or a professional test is the starting point, not a guess based on your neighbor's result.
- 2
Confirm your result. Know your actual number before deciding on next steps.
- 3
If elevated, contact PA DEP-certified mitigators. Use the state directory, not a general contractor search.
- 4
Retest after work is completed. A finished install should come with a follow-up test that confirms the fix actually worked.