Williamsport, KY Radon Levels

Q: What EPA Radon Zone is Williamsport in?

Williamsport is in Johnson County, EPA Zone 2.

Q: How much does radon mitigation cost in Williamsport?

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

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

Williamsport, KY Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Johnson County, KY

Zip Code 41271

Positioned in Johnson County in eastern Kentucky's mountainous region, Williamsport sits atop complex Appalachian geology that can produce variable radon levels. With testing data limited for the 41271 area, professional radon assessment becomes crucial for residents. The area's mix of sandstone and shale formations, combined with coal seams, creates unpredictable conditions for radon gas migration.

6.67

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 6.67 pCi/L, based on 3 tests from 3 nearby cities. No readings have been submitted for Williamsport yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Williamsport, KY Radon Mitigation

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

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Radon Readings Near Williamsport, KY

No homeowner tests have been submitted for Williamsport 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
Catlettsburg	38.2 mi	6.00 pCi/L	1
Ashland	42.6 mi	4.00 pCi/L	1
Russell	47.4 mi	10.00 pCi/L	1

Johnson County Radon Profile

The soils and bedrock of Johnson County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Few homeowner tests have been logged inside Johnson County so far, which is why this page draws on the nearest recorded readings to illustrate regional radon levels. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Johnson County to test, as levels can differ between neighboring homes.

Radon FAQ for Williamsport, KY

What EPA Radon Zone is Williamsport in?

Williamsport and the 41271 zip code are in Johnson County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Williamsport?

No homeowner radon tests have been submitted for Williamsport yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Johnson County average—are the best available indicator of local conditions until Williamsport 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 Williamsport?

Radon mitigation in Williamsport 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 Williamsport?

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.