Monticello, WI Radon Levels

Q: What EPA Radon Zone is Monticello in?

Monticello is in Green County, EPA Zone 1.

Q: How much does radon mitigation cost in Monticello?

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

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

Monticello, WI Radon Facts

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

County Green County, WI

Zip Code 53570

Part of the Madison Metro area in Green County, Monticello sits over limestone bedrock and glacial deposits typical of southern Wisconsin's driftless region. Many homes feature full basements common to Wisconsin construction, providing enclosed spaces where radon can accumulate. With limited testing data for zip code 53570, residents should test their homes to determine individual radon levels.

11.00

pCi/L area average

Above EPA Action Level

Green County average: 11.00 pCi/L, based on 3 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Monticello 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+

Monticello, WI 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 Monticello, WI

No homeowner tests have been submitted for Monticello 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
New Glarus	5.3 mi	7.00 pCi/L	1
Monroe	10.0 mi	13.00 pCi/L	2
Oregon	17.2 mi	12.00 pCi/L	1
Verona	18.1 mi	18.00 pCi/L	1
Mount Horeb	19.2 mi	9.00 pCi/L	1
Blue Mounds	21.5 mi	15.00 pCi/L	1
Mc Farland	24.4 mi	9.00 pCi/L	1
Middleton	25.6 mi	4.00 pCi/L	1

Green County Radon Profile

Because of its underlying geology, Green 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 Green County average 11.00 pCi/L across 3 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 Green County home regardless of zone or a neighbor's results.

Radon FAQ for Monticello, WI

What EPA Radon Zone is Monticello in?

Monticello and the 53570 zip code are in Green 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 Monticello?

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

Radon mitigation in Monticello 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 Monticello?

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.