Lancaster, WI Radon Levels

Q: What EPA Radon Zone is Lancaster in?

Lancaster is in Grant County, EPA Zone 1.

Q: How much does radon mitigation cost in Lancaster?

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

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

Lancaster, WI Radon Facts

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

County Grant County, WI

Zip Code 53813

Found in Grant County within Wisconsin's Driftless Area, Lancaster sits atop limestone and sandstone formations that can create variable radon conditions. Since testing data for the 53813 zip code area is currently limited, homeowners should conduct professional radon testing to establish accurate readings for this southwestern Wisconsin community.

17.00

pCi/L area average

Above EPA Action Level

Grant County average: 17.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Lancaster 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+

Lancaster, 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 Lancaster, WI

No homeowner tests have been submitted for Lancaster 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
Potosi	10.8 mi	17.00 pCi/L	1
Prairie Du Chien	24.8 mi	10.00 pCi/L	2
Blue River	27.8 mi	6.00 pCi/L	1
Ridgeway	38.2 mi	8.00 pCi/L	1
Spring Green	40.3 mi	4.00 pCi/L	1
Blue Mounds	45.7 mi	15.00 pCi/L	1
Viroqua	49.2 mi	5.00 pCi/L	1

Grant County Radon Profile

Because of its underlying geology, Grant 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 1 city in Grant County average 17.00 pCi/L across 1 test — 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 Grant County home regardless of zone or a neighbor's results.

Radon FAQ for Lancaster, WI

What EPA Radon Zone is Lancaster in?

Lancaster and the 53813 zip code are in Grant 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 Lancaster?

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

Radon mitigation in Lancaster 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 Lancaster?

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.