Merrillan, WI Radon Levels

Q: What EPA Radon Zone is Merrillan in?

Merrillan is in Clark County, EPA Zone 2.

Q: How much does radon mitigation cost in Merrillan?

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

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

Merrillan, WI Radon Facts

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

County Clark County, WI

Zip Code 54754

Tucked into Clark County's rural landscape, Merrillan sits where Wisconsin's glacial deposits create moderate-to-high radon potential throughout zip code 54754. Testing data for this small community remains limited, making individual home assessment crucial for residents. Central Wisconsin's combination of uranium-bearing glacial till and the prevalence of full basement construction means radon levels can vary substantially, even among neighboring properties.

7.54

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 7.54 pCi/L, based on 13 tests from 10 nearby cities. No readings have been submitted for Merrillan yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Merrillan, 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 Merrillan, WI

No homeowner tests have been submitted for Merrillan 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
Black River Falls	9.8 mi	9.00 pCi/L	1
Osseo	21.9 mi	5.00 pCi/L	1
Fall Creek	32.7 mi	8.00 pCi/L	1
Sparta	33.4 mi	5.00 pCi/L	2
Marshfield	34.8 mi	13.50 pCi/L	2
Holmen	38.6 mi	2.00 pCi/L	1
Altoona	39.9 mi	6.00 pCi/L	1
Onalaska	42.7 mi	3.00 pCi/L	1

Clark County Radon Profile

EPA mapping assigns Clark County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Direct test data for Clark County remains limited, so the closest neighboring readings are used here to represent the radon conditions homeowners are likely to encounter. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Clark County home regardless of zone or a neighbor's results.

Radon FAQ for Merrillan, WI

What EPA Radon Zone is Merrillan in?

Merrillan and the 54754 zip code are in Clark 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 Merrillan?

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

Radon mitigation in Merrillan 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 Merrillan?

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.