Ottawa, OH Radon Mitigation and Testing

Q: What EPA Radon Zone is Ottawa in?

Ottawa is in Putnam County, EPA Zone 2.

Q: How much does radon mitigation cost in Ottawa?

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

Putnam County

EPA Zone 2

Situated in Putnam County in northwestern Ohio, Ottawa currently has limited radon testing data available for the 45875 zip code. With the region's glacial clay soils over limestone bedrock, radon levels can vary significantly between neighboring properties. Homeowners should conduct professional radon testing to understand their specific exposure risk.

Ottawa, OH Radon Mitigation

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

Ottawa, OH Radon Testing

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

Ottawa Radon Facts

Key details about the radon risk profile for Ottawa and the 45875 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Putnam County, OH

Zip Code

45875

Predicted Screening Level

2–4 pCi/L (Zone 2)

Ottawa and the 45875 zip code are located in Putnam County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Ottawa, OH

What EPA Radon Zone is Ottawa in?

Ottawa and the 45875 zip code are in Putnam County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Ottawa?

Radon mitigation in Ottawa 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 Ottawa?

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