Northumberland, PA Radon Levels

Q: What EPA Radon Zone is Northumberland in?

Northumberland is in Northumberland County, EPA Zone 1.

Q: How much does radon mitigation cost in Northumberland?

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

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

Northumberland, PA Radon Facts

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

County Northumberland County, PA

Zip Code 17857

Northumberland sits at the confluence of the North and West branches of the Susquehanna River in Northumberland County, where Pennsylvanian-era sedimentary rock formations contribute to Pennsylvania's elevated radon potential. Testing data for zip code 17857 remains limited, making individual radon measurements essential for residents. Given Pennsylvania's high statewide radon occurrence and the area's mix of historic riverfront homes and modern construction, comprehensive testing is particularly important for homeowner safety.

14.00

pCi/L area average

Above EPA Action Level

Northumberland County average: 14.00 pCi/L, based on 2 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Northumberland 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+

Northumberland, PA 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 Northumberland, PA

No homeowner tests have been submitted for Northumberland 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
Shamokin Dam	4.4 mi	7.00 pCi/L	2
Selinsgrove	7.0 mi	11.00 pCi/L	1
Lewisburg	7.7 mi	13.00 pCi/L	1
Danville	10.2 mi	5.67 pCi/L	3
New Columbia	11.9 mi	20.00 pCi/L	1
Mifflinburg	13.6 mi	4.00 pCi/L	1
Coal Township	14.7 mi	8.00 pCi/L	1
Mount Carmel	20.8 mi	20.00 pCi/L	1

Northumberland County Radon Profile

Because of its underlying geology, Northumberland 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 2 cities in Northumberland County average 14.00 pCi/L across 2 tests — 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 Northumberland County home regardless of zone or a neighbor's results.

Radon FAQ for Northumberland, PA

What EPA Radon Zone is Northumberland in?

Northumberland and the 17857 zip code are in Northumberland 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 Northumberland?

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

Radon mitigation in Northumberland 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 Northumberland?

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.