Lima, OH Radon Mitigation and Testing

Q: What is the average radon level in Lima, OH?

Based on 1 user-submitted tests, the average radon level is 5.00 pCi/L.

Q: What EPA Radon Zone is Lima in?

Lima is in Allen County, EPA Zone 1.

Q: How much does radon mitigation cost in Lima?

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

Avg: 5.00 pCi/L

Allen County

EPA Zone 1

1 user test

Lima in Allen County shows an average radon level of 5.0 pCi/L, which exceeds the EPA action threshold of 4.0 pCi/L. Built on glacial till over limestone bedrock in west-central Ohio, the community's housing stock includes many older homes with full basements where radon can accumulate. Homeowners across Lima's 45801, 45804, 45805, 45806, and 45807 zip codes should prioritize testing and mitigation when elevated levels are found.

5.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Lima, OH Radon Mitigation

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

Lima, OH Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Lima, Ohio Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Lima, OH	21-50 Years	Full Basement	Feb 2021

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

Lima Radon Facts

Key details about the radon risk profile for Lima and the 45801 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Allen County, OH

Zip Code

45801

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

5.00 pCi/L

User Tests Submitted

Lima and the 45801 zip code are located in Allen County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Lima, OH

What is the average radon level in Lima, OH?

Based on 1 user-submitted test, the average radon level in Lima is 5.00 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 Lima in?

Lima and the 45801 zip code are in Allen 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 Lima?

Radon mitigation in Lima 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 Lima?

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 Ohio

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Marietta	8.00 pCi/L	5
Cincinnati	5.20 pCi/L	5
Hilliard	11.75 pCi/L	4
Wilmington	5.25 pCi/L	4
Newark	15.00 pCi/L	3
Athens	11.33 pCi/L	3
Findlay	10.33 pCi/L	3
Perrysburg	9.67 pCi/L	3
Powell	8.33 pCi/L	3
Columbus	6.00 pCi/L	3
Chagrin Falls	4.67 pCi/L	3
Hamilton	10.00 pCi/L	2
Chardon	5.50 pCi/L	2
Strongsville	4.50 pCi/L	2
Maineville	10.00 pCi/L	1
Lancaster	9.00 pCi/L	1
West Chester	9.00 pCi/L	1
Amherst	6.00 pCi/L	1
Chillicothe	6.00 pCi/L	1
Lima	5.00 pCi/L	1