Radon Mitigation in York

Radon Mitigation in York, PA

DEP-certified contractors that install, service and test radon mitigation systems in York and York County, with the work each one takes on stated plainly.

Call (223) 21-RADONOne number for York County. Tell us your test result and get pointed to a DEP-certified mitigator.

This site lists the radon mitigation and radon testing companies that serve York, PA and York County, and every one of them is on the Pennsylvania DEP certified list. DEP certification means the state has examined the installer or tester and licenses them to do the work; Pennsylvania requires it of anyone paid to mitigate or measure radon. Each listing says what the company does, where it works and how to reach it.

Companies serving York, PA

Radon mitigation systems · 7Radon testing & inspection · 10Fan replacement, repair & service · 3New construction & passive systems · 2Radon in well water · 2Home inspection · 7

13 companies. Ordered by the rules on our methodology page.

Radon in York County homes

York County is in EPA Zone 1, the highest-risk band, and DEP's test records back that up: 52.5% of the 98,845 York County radon tests reported to DEP from 1986 to July 2026 are at or above the EPA action level of 4.0 pCi/L, against 33.7% statewide. The median basement test in the county is 4.9 pCi/L; see radon levels by ZIP code. The geology is the reason. The Piedmont limestone and carbonate belt under York itself, the Peach Bottom slate in the southern townships and the shale and sandstone to the north all release radon from uranium in the rock, and the gas moves up through the soil and into any house with a slab, a basement or a crawl space.

Most calls are about one of four things:

  • A high test result during a home sale, where the buyer's inspector ran a 48-hour test and the number came back over 4.0.
  • A homeowner test kit result that came back high after a January test.
  • A system that stopped working: the manometer reads level, the fan is silent or loud, or a follow-up test is high again.
  • A new house with builder piping (a passive rough-in) that needs a fan added.

What "radon mitigation" means here

In Pennsylvania anyone who tests for or mitigates radon for pay must be certified by the Department of Environmental Protection under the Radon Certification Act (Act 43 of 1987). Testing and mitigation are separate certifications, and the companies listed here fall into three groups. Mitigation contractors design and install the system, usually active sub-slab depressurization: a suction point under the slab, PVC pipe up and out, a fan that runs continuously, and a manometer that shows it is pulling. Most also test before and after and service fans. Testing-only firms and home inspectors measure radon with a continuous monitor or charcoal kit and write the report, which is what you want for an independent number, especially in a real-estate deal. Water treatment firms handle radon in well water, a separate problem that is common in rural York County.

Whoever you call, the job should end with a post-mitigation test showing the house under 4.0 pCi/L, and ideally under 2.0. A quote that does not include the fan, the manometer and a follow-up test is not a complete quote. Radon reduction, radon removal and radon abatement all mean the same thing on this site: a mitigation system, installed by someone the DEP has certified.

Guides

Aerial view of York, PA rowhouses and suburban streets with farmland and wooded hills beyond at sunset

York County radon levels by ZIP code

98,845 DEP test results, ZIP by ZIP. About half of York County tests reach the EPA action level.

Radon fan, PVC pipe fittings, U-tube manometer, tape measure and clipboard laid out on a basement workbench

What a radon mitigation system costs in York, PA

The York County price band, what makes a system cost more, what the fan costs to run, and the six things a quote must include.

Exterior radon mitigation system: white vent pipe with an inline fan running up the side wall of a two-storey house

How a radon mitigation system works

The four parts of a system, why it works, the five DEP-recognized methods, and how to tell a good installation from a bad one.

Charcoal radon test kit and a digital continuous radon monitor on a side table in a finished basement

Radon testing in York County: kits, monitors and what the number means

What a pCi/L is, the difference between a $20 kit and a certified test, the best month, and when to hire a tester instead.

Home inspector showing a couple their radon test results on a tablet in an unfinished basement with a mitigation pipe

Buying or selling a house with radon in Pennsylvania

The buyer tested, the number is 9.2. What Pennsylvania law says, who usually pays, and how to keep the deal together.

Technician wearing a headlamp fitting an inline radon fan to a vent pipe in an attic

Radon fan replacement, repair and passive system activation

The fan is the only part that wears out. What failure looks like, what it costs, and what to do with the pipe the builder left.

Homeowner in a garage studying a radon fan, PVC pipe, a core bit and a system diagram before a DIY installation

DIY radon mitigation vs a DEP-certified contractor in Pennsylvania

You may install your own system in Pennsylvania. Whether you should, what usually goes wrong, and how to verify a contractor's certification.

Old stone farmhouse and well house on a rocky outcrop above York County farmland

Radon in York County: why levels run high, and radon in well water

About half of York County tests reach the EPA action level. The rock, the houses and the wells that explain it, and what to do about radon in your water.

Block-wall basement with a radon vent pipe and manometer, a dehumidifier running and a hygrometer on the wall

Does a radon mitigation system reduce humidity or cause mold?

An EPA study of three Pennsylvania houses found radon systems dried basements except in summer. What the system does to moisture, and when it can cause mold.

Insurance policy papers, reading glasses, a radon test puck and a calculator on a kitchen table with the basement door open

Will insurance pay for a radon mitigation system in Pennsylvania?

Homeowners insurance does not pay, and health insurance almost never does. What an HSA, a renovation loan, a weatherization program or the seller can cover.

All guides

Questions people ask

Does a radon mitigation system actually work?

Yes. An active sub-slab depressurization system, which is what nearly every house in the York area gets, typically cuts radon by 80 to 99 percent.

What is the average cost for radon mitigation?

In York and York County, a standard system on a house with a basement runs about $875 to $2,200 installed, with most quotes landing between $1,200 and $1,800. Crawl spaces, slabs with no sump, houses that need two suction points, or a fan that has to go through the roof push the number up.

Is it safe to live in a house with radon mitigation?

It is safer than living in one without. A mitigation system does not mean the house is dangerous; it means the house tested high once and someone fixed it.

Can I remediate radon myself?

Legally, a Pennsylvania homeowner may install a system in their own home; the Radon Certification Act only covers people who do the work for pay. Practically, it is a job most people should not take on.

What states are worst for radon?

Pennsylvania is consistently near the top, along with Iowa, Ohio and the northern Rocky Mountain states. By DEP's estimate about 40 percent of Pennsylvania homes are above the EPA action level, against a national figure of about one in fifteen.

All questions

Areas we cover

Map of the York, PA service areaYorkHanoverRed LionDallastownDoverShrewsburyLancasterHarrisburgGettysburg© OpenStreetMap contributors
YorkHanoverRed LionDallastownDoverShrewsburyLancasterHarrisburgGettysburg
Call (223) 21-RADON