Leonidas, MI Radon Levels

Q: What EPA Radon Zone is Leonidas in?

Leonidas is in St Joseph County, EPA Zone Unknown.

Q: How much does radon mitigation cost in Leonidas?

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

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

Leonidas, MI Radon Facts

EPA Radon Zone Unknown Unknown

County St Joseph County, MI

Zip Code 49066

Located in St. Joseph County in southwestern Michigan, Leonidas sits where glacial till deposits over limestone and sandstone bedrock contribute to the state's elevated radon potential. The rural community features traditional Midwest agricultural housing, including farmsteads and rural properties with many homes built on full basements. Since comprehensive radon testing data for the 49066 area remains unavailable, residents should conduct professional assessment to establish individual property risk levels.

6.00

pCi/L area average

Above EPA Action Level

St Joseph County average: 6.00 pCi/L, based on 2 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Leonidas 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+

Leonidas, 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 Leonidas, MI

No homeowner tests have been submitted for Leonidas 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
Three Rivers	15.5 mi	6.00 pCi/L	2
Portage	16.9 mi	3.33 pCi/L	3
Ceresco	17.5 mi	3.00 pCi/L	1
Coldwater	19.1 mi	9.00 pCi/L	1
Battle Creek	21.6 mi	6.60 pCi/L	5
Marshall	26.1 mi	8.50 pCi/L	2
Mattawan	27.2 mi	4.00 pCi/L	1
Paw Paw	31.6 mi	4.00 pCi/L	1

St Joseph County Radon Profile

St Joseph County lacks a firm EPA zone classification, and the EPA recommends testing every home regardless of regional radon predictions. Homeowner-submitted tests from 2 cities in St Joseph County average 6.00 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 St Joseph County home regardless of zone or a neighbor's results.

Radon FAQ for Leonidas, MI

What EPA Radon Zone is Leonidas in?

Leonidas and the 49066 zip code are in St Joseph County, which has an EPA assigned Radon Zone of Unknown. A zone of Unknown does not have sufficient data for classification.

Why are radon readings shown from areas near Leonidas?

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

Radon mitigation in Leonidas 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 Leonidas?

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.