Williamsburg, MI Radon Levels

Q: What EPA Radon Zone is Williamsburg in?

Williamsburg is in Grand Traverse County, EPA Zone 3.

Q: Why are radon readings shown from areas near Williamsburg?

No homeowner radon tests have been submitted for Williamsburg yet, so readings from the closest cities and the Grand Traverse County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Williamsburg?

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

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

Williamsburg, MI Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)

County Grand Traverse County, MI

Zip Code 49690

Located in Grand Traverse County within the Traverse City Metro area, Williamsburg sits in EPA Zone 3 where glacial deposits and Great Lakes influence create generally lower radon potential. Testing submissions for this 49690 community remain limited, emphasizing the value of individual property assessment. Despite the zone designation, Michigan's varied glacial geology means radon levels can differ between homes, particularly those with different foundation types or construction eras.

5.00

pCi/L area average

Above EPA Action Level

Grand Traverse County average: 5.00 pCi/L, based on 4 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Williamsburg 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+

Williamsburg, 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 Williamsburg, MI

No homeowner tests have been submitted for Williamsburg 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
Traverse City	8.9 mi	5.00 pCi/L	3
Kingsley	16.3 mi	5.00 pCi/L	1
Central Lake	20.6 mi	5.00 pCi/L	1
Maple City	22.2 mi	2.00 pCi/L	1
Boyne City	34.5 mi	12.50 pCi/L	2
Cadillac	38.1 mi	6.00 pCi/L	1
Gaylord	40.0 mi	5.80 pCi/L	5
Petoskey	46.0 mi	8.00 pCi/L	1

Grand Traverse County Radon Profile

Local geology places Grand Traverse County in EPA Radon Zone 3, where predicted indoor radon averages fall below 2 pCi/L — though no county is risk-free. Homeowner-submitted tests from 2 cities in Grand Traverse County average 5.00 pCi/L across 4 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Grand Traverse County to test, as levels can differ between neighboring homes.

Radon FAQ for Williamsburg, MI

What EPA Radon Zone is Williamsburg in?

Williamsburg and the 49690 zip code are in Grand Traverse County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

Why are radon readings shown from areas near Williamsburg?

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

Radon mitigation in Williamsburg 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 Williamsburg?

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.