Grassflat, PA Radon Levels

Q: What EPA Radon Zone is Grassflat in?

Grassflat is in Clearfield County, EPA Zone 1.

Q: How much does radon mitigation cost in Grassflat?

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

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

Grassflat, PA Radon Facts

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

County Clearfield County, PA

Zip Code 16839

This small community in Clearfield County sits within zip code 16839 in the Allegheny Plateau region of central Pennsylvania. The area's geology includes Pennsylvanian and Devonian sedimentary rocks that can contribute to radon production, while local housing consists primarily of rural homes and cabins, many with partial basements typical of mountain communities. Without comprehensive radon testing data, residents should conduct individual testing to assess their home's radon levels.

13.83

pCi/L area average

Above EPA Action Level

Clearfield County average: 13.83 pCi/L, based on 6 user-submitted tests across 5 cities in the county. No homeowner readings have been submitted for Grassflat 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+

Grassflat, 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 Grassflat, PA

No homeowner tests have been submitted for Grassflat 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
Philipsburg	9.9 mi	10.00 pCi/L	2
Clearfield	17.4 mi	12.00 pCi/L	1
Houtzdale	17.8 mi	14.00 pCi/L	2
State College	18.8 mi	9.93 pCi/L	15
Bellefonte	19.1 mi	13.00 pCi/L	2
Curwensville	21.9 mi	4.00 pCi/L	1
Boalsburg	23.1 mi	2.00 pCi/L	1
Grampian	25.3 mi	19.00 pCi/L	1

Clearfield County Radon Profile

Because of its underlying geology, Clearfield 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 5 cities in Clearfield County average 13.83 pCi/L across 6 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 Clearfield County home regardless of zone or a neighbor's results.

Radon FAQ for Grassflat, PA

What EPA Radon Zone is Grassflat in?

Grassflat and the 16839 zip code are in Clearfield 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 Grassflat?

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

Radon mitigation in Grassflat 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 Grassflat?

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.