Williamstown, PA Radon Levels

Q: What EPA Radon Zone is Williamstown in?

Williamstown is in Dauphin County, EPA Zone 1.

Q: How much does radon mitigation cost in Williamstown?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Check local Williamstown radon levels and find certified testing and mitigation professionals to keep your home safe

Williamstown, PA Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Dauphin County, PA

Zip Code 17098

Nestled in Dauphin County within the Harrisburg Metro area, Williamstown sits in Pennsylvania's complex geological landscape where limestone and shale formations can contribute to radon production. With testing data currently limited for the 17098 zip code, homeowners should pursue independent radon testing to assess their individual risk. The community's location in EPA Zone 1 indicates higher radon potential, making professional testing particularly important for all residents.

13.00

pCi/L area average

Above EPA Action Level

Dauphin County average: 13.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Williamstown itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Williamstown, PA Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Need Radon Mitigation or Testing in Williamstown?

100% Free, No-Obligation Quotes
Matches You with State-Licensed Dauphin County Pros

1-800-299-3578 717-283-2136 (local) Toll-free · Mon–Fri 8am–6pm ET

Radon Readings Near Williamstown, PA

No homeowner tests have been submitted for Williamstown yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Valley View	6.0 mi	20.00 pCi/L	1
Coal Township	15.0 mi	8.00 pCi/L	1
Pine Grove	15.5 mi	20.00 pCi/L	1
Annville	16.8 mi	14.00 pCi/L	1
Mount Carmel	18.2 mi	20.00 pCi/L	1
Lebanon	18.9 mi	5.00 pCi/L	1
Selinsgrove	21.1 mi	11.00 pCi/L	1
Shamokin Dam	21.1 mi	7.00 pCi/L	2

Dauphin County Radon Profile

Because of its underlying geology, Dauphin County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 1 city in Dauphin County average 13.00 pCi/L across 1 test — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Dauphin County home regardless of zone or a neighbor's results.

Radon FAQ for Williamstown, PA

What EPA Radon Zone is Williamstown in?

Williamstown and the 17098 zip code are in Dauphin County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

Why are radon readings shown from areas near Williamstown?

No homeowner radon tests have been submitted for Williamstown yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Dauphin County average—are the best available indicator of local conditions until Williamstown homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Williamstown?

Radon mitigation in Williamstown typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Williamstown?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.