Orfordville, WI Radon Levels

Q: What EPA Radon Zone is Orfordville in?

Orfordville is in Rock County, EPA Zone 1.

Q: How much does radon mitigation cost in Orfordville?

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

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

Orfordville, WI Radon Facts

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

County Rock County, WI

Zip Code 53576

This small Rock County community in the Janesville Metro area sits atop dolomite bedrock and glacial deposits that can produce varying radon levels throughout zip code 53576. Although specific testing data for Orfordville is currently limited, the underlying geology suggests homeowners should test for radon. Many local homes feature the full basements common to Wisconsin construction, creating enclosed spaces where radon typically concentrates.

11.50

pCi/L area average

Above EPA Action Level

Rock County average: 11.50 pCi/L, based on 2 user-submitted tests across 1 city in the county. No homeowner readings have been submitted for Orfordville 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+

Orfordville, 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 Orfordville, WI

No homeowner tests have been submitted for Orfordville 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
Milton	18.5 mi	11.50 pCi/L	2
Monroe	19.8 mi	13.00 pCi/L	2
Oregon	21.9 mi	12.00 pCi/L	1
New Glarus	23.6 mi	7.00 pCi/L	1
Mc Farland	26.5 mi	9.00 pCi/L	1
Verona	29.8 mi	18.00 pCi/L	1
Delavan	31.8 mi	6.00 pCi/L	1
Fontana	35.3 mi	4.50 pCi/L	2

Rock County Radon Profile

The bedrock and soils beneath Rock County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 1 city in Rock County average 11.50 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Rock County.

Radon FAQ for Orfordville, WI

What EPA Radon Zone is Orfordville in?

Orfordville and the 53576 zip code are in Rock 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 Orfordville?

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

Radon mitigation in Orfordville 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 Orfordville?

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.