Hartford, WI Radon Levels

Q: What EPA Radon Zone is Hartford in?

Hartford is in Washington County, EPA Zone 1.

Q: How much does radon mitigation cost in Hartford?

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

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

Hartford, WI Radon Facts

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

County Washington County, WI

Zip Code 53027

Located in Washington County northwest of Milwaukee, Hartford sits on glacial drift deposits over dolomite bedrock typical of southeastern Wisconsin's high radon zone. The city's residential neighborhoods feature predominantly single-family homes built from the mid-20th century onward, most with full basements standard in Wisconsin construction. While comprehensive testing data isn't available for Hartford, the EPA Zone 1 designation and regional geology make professional radon testing essential for local homeowners.

12.00

pCi/L area average

Above EPA Action Level

Washington County average: 12.00 pCi/L, based on 3 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Hartford 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+

Hartford, 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 Hartford, WI

No homeowner tests have been submitted for Hartford 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
Slinger	4.6 mi	20.00 pCi/L	1
West Bend	12.2 mi	8.00 pCi/L	1
Juneau	16.4 mi	4.00 pCi/L	1
Kewaskum	16.8 mi	8.00 pCi/L	1
Menomonee Falls	16.9 mi	6.50 pCi/L	2
Pewaukee	17.1 mi	10.00 pCi/L	1
Watertown	18.3 mi	7.00 pCi/L	1
Cedarburg	18.5 mi	6.00 pCi/L	1

Washington County Radon Profile

Because of its underlying geology, Washington 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 3 cities in Washington County average 12.00 pCi/L across 3 tests — 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 Washington County home regardless of zone or a neighbor's results.

Radon FAQ for Hartford, WI

What EPA Radon Zone is Hartford in?

Hartford and the 53027 zip code are in Washington 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 Hartford?

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

Radon mitigation in Hartford 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 Hartford?

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.