Plain, WI Radon Levels

Q: What EPA Radon Zone is Plain in?

Plain is in Sauk County, EPA Zone 2.

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

No homeowner radon tests have been submitted for Plain yet, so readings from the closest cities and the Sauk 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 Plain?

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

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

Plain, WI Radon Facts

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

County Sauk County, WI

Zip Code 53577

This small Sauk County community sits amid Wisconsin's glacial landscape, where sandstone bedrock and glacial deposits can create variable radon conditions. Since local testing data for Plain (53577) remains sparse, homeowners lack specific information about area radon levels. Wisconsin's diverse geology makes individual testing essential for determining radon risk in any given property.

6.75

pCi/L area average

Above EPA Action Level

Sauk County average: 6.75 pCi/L, based on 4 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Plain 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+

Plain, 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 Plain, WI

No homeowner tests have been submitted for Plain 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
Spring Green	7.2 mi	4.00 pCi/L	1
Reedsburg	16.8 mi	5.00 pCi/L	1
La Valle	19.5 mi	9.00 pCi/L	2
Ridgeway	20.0 mi	8.00 pCi/L	1
Blue Mounds	22.8 mi	15.00 pCi/L	1
Mount Horeb	25.6 mi	9.00 pCi/L	1
Blue River	27.0 mi	6.00 pCi/L	1
Middleton	30.5 mi	4.00 pCi/L	1

Sauk County Radon Profile

The soils and bedrock of Sauk County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 3 cities in Sauk County average 6.75 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 Sauk County to test, as levels can differ between neighboring homes.

Radon FAQ for Plain, WI

What EPA Radon Zone is Plain in?

Plain and the 53577 zip code are in Sauk 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 Plain?

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

Radon mitigation in Plain 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 Plain?

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.