Local radon guide
Radon Mitigation in Shrewsbury, PA
Shrewsbury sits just below the York County average for elevated basement radon. Of 1,628 basement radon tests from homes with a Shrewsbury mailing address reported to the Pennsylvania DEP, 53.6% came in at or above 4.0 pCi/L, with a median of 4.6 pCi/L. That is slightly below the York County share of 56.5%, but more than half of tested homes still came back at or above the action level, so testing your own home is the only way to know your number.
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.
Shrewsbury radon test results
| Measure | Shrewsbury | York County |
|---|---|---|
| Basement tests | 1,628 | 81,840 |
| Median basement result | 4.6 pCi/L | 4.9 pCi/L |
| At or above 4.0 pCi/L | 53.6% | 56.5% |
| At or above 10 pCi/L | 26.3% | 29.4% |
| At or above 20 pCi/L | 11.6% | 14.6% |
The Shrewsbury mailing address includes surrounding townships that share its post office, so these numbers reflect more than the borough alone. They are tests reported to DEP, not a random sample of homes.
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.
Radon mitigation cost in Shrewsbury
Homeowners with a Shrewsbury address paid a median of $1,065 for a mitigation system (2022–2026, 59 systems reported to DEP). Across York County, most jobs cost $935 to $1,320.
Source: Pennsylvania DEP, Radon Mitigation System records (data.pa.gov), York County systems reported 2024–2026. Retrieved September 30, 2026.
Shrewsbury's median sits close to the county figure, so a quote well outside the $935–$1,320 range should come with a clear reason. See the full breakdown on our radon mitigation cost page.
How mitigation works in Shrewsbury homes
Most York County systems are sub-slab depressurization: a suction point under the slab, PVC pipe, and an inline fan that vents soil gas above the roofline. For Shrewsbury homes near the I-83 corridor, the pipe route and fan location are usually the main design decisions a mitigator makes.
Across York County systems reported to DEP, the median radon level fell from 12 pCi/L before mitigation to 1.0 pCi/L after, and 97.4% of systems tested below 4.0 afterward. See how the systems work.
Hiring a certified mitigator for your Shrewsbury home
Pennsylvania requires DEP certification for anyone performing radon testing or mitigation for hire. The PA DEP Radon Services Directory lets you confirm a company's certification status before you schedule a visit.
Ask for a written scope, a fan warranty, and a post-mitigation test. Our hiring guide covers the full checklist before you sign.
Nearby
Looking at a nearby community? See New Freedom and Glen Rock.
See all York County towns and back to our York radon mitigation guide.
Learn more about the community on the Shrewsbury, Pennsylvania Wikipedia page.
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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.