Norwalk, IA Radon Levels

Q: What is the average radon level in Norwalk, IA?

Based on 2 user-submitted tests, the average radon level is 10.50 pCi/L.

Q: What EPA Radon Zone is Norwalk in?

Norwalk is in Warren County, EPA Zone 1.

Q: How much does radon mitigation cost in Norwalk?

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

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

Norwalk, IA Radon Facts

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

County Warren County, IA

Zip Code 50211

Avg. User Level 10.50 pCi/L

User Tests 2

Norwalk in Warren County shows significantly elevated radon levels averaging 10.5 pCi/L, well above EPA's action threshold. Located within the Des Moines metro area, this central Iowa community sits over glacial deposits and limestone bedrock that create highly favorable conditions for radon gas production and accumulation. Immediate professional testing and mitigation are critical for all residents, especially those in homes with basement foundations typical of Iowa construction.

10.50

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Norwalk, IA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Norwalk, IA Radon Mitigation

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

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Norwalk, Iowa Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
10 pCi/L	Norwalk, IA	21-50 Years	Full Basement	Apr 2023
11 pCi/L	Norwalk, IA	21-50 Years	Full Basement	Apr 2016

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

Radon FAQ for Norwalk, IA

What is the average radon level in Norwalk, IA?

Based on 2 user-submitted tests, the average radon level in Norwalk is 10.50 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 Norwalk in?

Norwalk and the 50211 zip code are in Warren 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 Norwalk?

Radon mitigation in Norwalk 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 Norwalk?

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.

Most Active Radon Markets in Iowa

Cities in Iowa with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
Waterloo	8.50 pCi/L	4
Ames	9.67 pCi/L	3
Fairfield	14.00 pCi/L	2
Mount Pleasant	12.00 pCi/L	2
Ottumwa	5.50 pCi/L	2
Iowa City	7.00 pCi/L	1
Muscatine	No submissions	0