Radon Mitigation in Lancaster, PA

Lancaster

Lancaster is twenty-five miles east of York across the Susquehanna, and the Lancaster County limestone valley has radon problems of its own, so the city has a deep bench of DEP-certified mitigators. Most will cross the river; the ones marked as serving York say so on their own sites. If you are in Lancaster itself, these are the local firms.

Radon levels in Lancaster County

Lancaster County is in EPA Radon Zone 1, the highest-potential band, like York County. The state's own test records show what that means in practice. Of the 135,473 Lancaster County radon tests reported to the Pennsylvania DEP from November 1986 to October 2026, 51.1% were at or above the EPA action level of 4.0 pCi/L, and the median result was 4.1 pCi/L. York County's rate over the same records is 52.4%, so the two counties are close to level, and both are well above the Pennsylvania figure of about a third.

Inside the city the shares are lower but still high:

Even in the lowest of the three, about two houses in five tested at the action level. Neighbors' results do not tell you yours; only a test in your own house does.

What a radon system costs in Lancaster

DEP's mitigation records include the price a certified mitigator reports for each system. For the 3,112 Lancaster County systems recorded from 2021 to 2026 with a price, the median was $1,195, and the middle half cost between $825 and $1,475. The York County median over the same years was $1,065 across 1,535 systems, so Lancaster jobs run a little higher, though both sit inside the $875 to $2,200 band in the radon mitigation cost guide.

Those are recorded prices across every kind of house, not quotes. A basement with a sump pit is at the low end. A crawl space, a slab-on-grade house, a split-level that needs a second suction point, or a pipe routed inside to the attic costs more. The fan adds about $5 to $10 a month in electricity and needs replacing after about ten years. A complete quote names the suction points, the pipe route, the fan model, the manometer and the post-mitigation test.

Who serves Lancaster

Two of the companies on this page are based in the city. Allied Home Inspections tests for radon and installs mitigation systems. Precise Inspecting tests for radon in air and in well water as part of its inspections and does not install systems, so its number is independent of whoever installs one. EnviroQuest and American Radon Solutions come from the Harrisburg side and install systems; TEK Inspection Services tests from York; and Carroll Water treats radon in private wells.

This directory is built around York County, so it lists the Lancaster firms that also work in York County, not every mitigator in Lancaster County. Whoever you call, ask for the DEP certification number and check it against the DEP Radon Services Directory before you sign.

Test first

A Lancaster house that has never been tested should start with a test: a charcoal kit for a first look, or a 48-hour continuous monitor run by a DEP-certified tester when a sale depends on the number. Test in the lowest lived-in level with the windows shut, in winter if you can. Radon testing in York County explains the kinds of test, and the advice is the same on either side of the river. A result at or above 4.0 pCi/L is the point to call one of the certified radon mitigation companies.