Watertown, WI Radon Levels

Q: What is the average radon level in Watertown, WI?

Based on 1 user-submitted tests, the average radon level is 7.00 pCi/L.

Q: What EPA Radon Zone is Watertown in?

Watertown is in Jefferson County, EPA Zone 1.

Q: How much does radon mitigation cost in Watertown?

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

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

Watertown, WI Radon Facts

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

County Jefferson County, WI

Zip Code 53094

Avg. User Level 7.00 pCi/L

User Tests 1

Positioned in Dodge County in southeastern Wisconsin, Watertown has recorded an average radon level of 7.0 pCi/L, significantly exceeding the EPA action threshold. The single test result from zip code 53098 indicates that radon mitigation is likely necessary for homes in this area. Wisconsin's glacial geology and common basement foundations create favorable conditions for radon accumulation.

7.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Watertown, WI. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Watertown, WI Radon Mitigation

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

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Watertown, Wisconsin Radon Levels

User-submitted radon test readings from homes in the Watertown area.

Radon Level	City	Home Age	Foundation	Submitted
7 pCi/L	Watertown, WI	21-50 Years	Full Basement	May 2018

Have a radon test result for Watertown? Submit your reading to help other homeowners.

Jefferson County Radon Profile

The bedrock and soils beneath Jefferson 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 Jefferson County average 7.00 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 Jefferson County.

Radon FAQ for Watertown, WI

What is the average radon level in Watertown, WI?

Based on 1 user-submitted test, the average radon level in Watertown is 7.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Watertown in?

Watertown and the 53094 zip code are in Jefferson 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.

How much does radon mitigation cost in Watertown?

Radon mitigation in Watertown 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 Watertown?

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.

Radon Levels Near Watertown, WI

User-submitted radon levels from the cities closest to Watertown with recorded test data. Explore nearby communities to compare local readings.

City	Distance	Avg User Level	Submissions
Juneau	10.1 mi	4.00 pCi/L	1
Beaver Dam	16.9 mi	10.00 pCi/L	1
Fall River	20.8 mi	10.00 pCi/L	1
Slinger	22.9 mi	20.00 pCi/L	1
Pewaukee	24.8 mi	10.00 pCi/L	1