Local radon guide
Radon Mitigation in Red Lion, PA
Red Lion homeowners face some of the highest radon readings in York County. Of 4,150 basement radon tests from homes with a Red Lion mailing address reported to the Pennsylvania DEP, 67.1% came in at or above 4.0 pCi/L, with a median of 7.7 pCi/L. That is well above the York County share of 56.5%, 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.
Red Lion radon test results
| Measure | Red Lion | York County |
|---|---|---|
| Basement tests | 4,150 | 81,840 |
| Median basement result | 7.7 pCi/L | 4.9 pCi/L |
| At or above 4.0 pCi/L | 67.1% | 56.5% |
| At or above 10 pCi/L | 41.9% | 29.4% |
| At or above 20 pCi/L | 23.4% | 14.6% |
The Red Lion 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 Red Lion
Homeowners with a Red Lion address paid a median of $1,175 for a mitigation system (2022–2026, 43 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.
See the full breakdown on our radon mitigation cost page.
How mitigation works in Red Lion 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. With Red Lion's high readings, getting the suction point placement right for your foundation is what determines how well the system works.
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 Red Lion home
Pennsylvania requires DEP certification for anyone performing radon testing or mitigation for hire. Start your search in the PA DEP Radon Services Directory rather than a general contractor listing, since not every company that advertises radon work is certified for mitigation specifically.
Ask any candidate for a written scope, a fan warranty, and a post-mitigation test to confirm the level dropped. Our hiring guide walks through the full checklist.
Nearby
Looking at a nearby community? See Dallastown and Windsor.
See all York County towns and back to our York radon mitigation guide.
Learn more about the community on the Red Lion, 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.