Highland, WI Radon Levels

Q: What EPA Radon Zone is Highland in?

Highland is in Iowa County, EPA Zone 1.

Q: How much does radon mitigation cost in Highland?

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

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

Highland, WI Radon Facts

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

County Iowa County, WI

Zip Code 53543

Set in the rolling driftless region of Iowa County within the Madison Metro area, Highland sits on unglaciated terrain with limestone bedrock close to the surface. While comprehensive testing data for zip code 53543 is still being collected, the area's geological characteristics suggest homeowners should test for radon, particularly those with basements in this rural Wisconsin community.

8.00

pCi/L area average

Above EPA Action Level

Iowa County average: 8.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Highland 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+

Highland, WI Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Need Radon Mitigation or Testing in Highland?

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Radon Readings Near Highland, WI

No homeowner tests have been submitted for Highland 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
Blue River	17.0 mi	6.00 pCi/L	1
Spring Green	17.7 mi	4.00 pCi/L	1
Ridgeway	19.2 mi	8.00 pCi/L	1
Blue Mounds	27.0 mi	15.00 pCi/L	1
Potosi	30.3 mi	17.00 pCi/L	1
Mount Horeb	31.7 mi	9.00 pCi/L	1
La Valle	37.7 mi	9.00 pCi/L	2
Reedsburg	38.0 mi	5.00 pCi/L	1

Iowa County Radon Profile

The bedrock and soils beneath Iowa 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 Iowa County average 8.00 pCi/L across 1 test — 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 Iowa County.

Radon FAQ for Highland, WI

What EPA Radon Zone is Highland in?

Highland and the 53543 zip code are in Iowa 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 Highland?

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

Radon mitigation in Highland 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 Highland?

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.