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Brookfield, WI Radon Levels

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


Brookfield, WI Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)
County Waukesha County, WI
Zip Code 53005
Avg. User Level 3.00 pCi/L
User Tests 1

Part of the Milwaukee Metro area in Waukesha County, this Brookfield community (zip code 53005) sits over glacial deposits that can contribute to radon accumulation in residential properties. While specific local testing data remains limited, the area's geological characteristics and predominantly single-family homes with full basements warrant regular radon testing. Homeowners should establish baseline readings to ensure their indoor air quality meets EPA safety standards.

3.00
pCi/L average
Below EPA Action Level

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

0
4.0 EPA
10+

Brookfield, WI Radon Mitigation

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

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Brookfield, WI Radon Levels

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

Radon LevelCityHome AgeFoundation
3 pCi/L Brookfield, WI 21-50 Years Full Basement

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

Radon Readings Near Brookfield, WI

Compare radon levels in Brookfield with the closest nearby cities that have user-submitted test data.

CityDistanceAvg User LevelReadings
Menomonee Falls 6.6 mi 6.50 pCi/L 2
Pewaukee 7.7 mi 10.00 pCi/L 1
Milwaukee 7.8 mi 10.00 pCi/L 3
Waukesha 8.8 mi 5.50 pCi/L 2
Franklin 12.6 mi 6.00 pCi/L 1
Thiensville 13.8 mi 5.00 pCi/L 1
Mequon 13.9 mi 6.00 pCi/L 1
Oak Creek 16.4 mi 8.33 pCi/L 3

Waukesha County Radon Profile

Waukesha County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 4 cities in Waukesha County average 6.80 pCi/L across 5 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Waukesha County to test, as levels can differ between neighboring homes.

Radon FAQ for Brookfield, WI

What is the average radon level in Brookfield, WI?
Based on 1 user-submitted test, the average radon level in Brookfield is 3.00 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.
What EPA Radon Zone is Brookfield in?
Brookfield and the 53005 zip code are in Waukesha 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 Brookfield?
Radon mitigation in Brookfield 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 Brookfield?
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.