Williamston, MI Radon Levels

Q: What EPA Radon Zone is Williamston in?

Williamston is in Ingham County, EPA Zone 2.

Q: How much does radon mitigation cost in Williamston?

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

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

Williamston, MI Radon Facts

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

County Ingham County, MI

Zip Code 48895

Williamston sits in Ingham County within the Lansing Metro region, where Michigan's glacial geology creates conditions conducive to radon accumulation. Testing data for the 48895 area is currently limited, underscoring the importance of professional radon evaluation for homeowners. The region's combination of glacial till and underlying sedimentary bedrock can produce variable radon levels between neighboring properties.

5.80

pCi/L area average

Above EPA Action Level

Ingham County average: 5.80 pCi/L, based on 5 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Williamston 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+

Williamston, MI 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 Williamston, MI

No homeowner tests have been submitted for Williamston 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
Okemos	6.4 mi	4.00 pCi/L	1
Haslett	6.7 mi	3.50 pCi/L	2
Fowlerville	11.5 mi	13.00 pCi/L	1
Mason	11.6 mi	6.00 pCi/L	1
Holt	12.4 mi	12.00 pCi/L	1
Lansing	14.0 mi	5.00 pCi/L	1
Dewitt	17.7 mi	20.00 pCi/L	1
Howell	19.2 mi	7.50 pCi/L	4

Ingham County Radon Profile

EPA mapping assigns Ingham County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 4 cities in Ingham County average 5.80 pCi/L across 5 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 Ingham County home regardless of zone or a neighbor's results.

Radon FAQ for Williamston, MI

What EPA Radon Zone is Williamston in?

Williamston and the 48895 zip code are in Ingham 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 Williamston?

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

Radon mitigation in Williamston 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 Williamston?

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.