Ohio — 2M metro

Radon in Cleveland,
OH

Cuyahoga County and surrounding Northeast Ohio counties are in EPA Zone 1. Cleveland's industrial history and older housing stock make radon awareness especially important, as many homes have never been tested despite decades of occupancy.

Risk Level

High Risk

2–7 pCi/L

Typical range (area avg.)

EPA action level: 4 pCi/L

Why Cleveland Has High Risk Radon

Northeast Ohio's glacial lake plain geography features thick glacial deposits over Devonian-age shales and limestones. Cleveland's Lake Erie shoreline creates unique pressure dynamics that can periodically flush — or concentrate — radon in shoreline homes.

Local Housing and Radon Risk

Cleveland has extensive neighborhoods of 1900–1940s construction in areas like Lakewood, Shaker Heights, and Parma. These older homes frequently have stone foundation walls and unfinished dirt-floor basements — worst-case radon scenarios.

Testing Advice for Cleveland Residents

Cuyahoga County Board of Health offers radon testing resources. For older Cleveland-area homes with stone foundations, professional mitigation is recommended over DIY approaches due to the complexity of multiple radon entry points.

How to Test Your Cleveland Home

Step 1: Choose Your Test Type

For initial screening, a charcoal short-term test kit ($12–$25) placed for 48–96 hours provides a quick result. For the most accurate reading, a long-term alpha-track test ($20–$35) left in place for 90+ days accounts for seasonal variation — especially important in Cleveland's climate.

Step 2: Place the Test Correctly

Test in your lowest livable level — basement if you have one, otherwise the first floor. Keep the test 20 inches from the floor, away from windows and exterior walls. Close windows and doors 12 hours before and during the test for accurate results.

Step 3: Interpret Your Results

Below 2 pCi/L: low concern, retest every 2 years. 2–4 pCi/L: consider mitigation, retest in 2 years. 4 pCi/L or higher: the EPA recommends mitigation. Above 8 pCi/L: prioritize mitigation promptly.

Step 4: Hire a Certified Mitigator if Needed

If your test result is at or above 4 pCi/L, hire a certified radon mitigator. In Ohio, always verify your contractor's state certification. Sub-slab depressurization — the most effective mitigation method — typically costs $800–$1,600 installed in the Cleveland area.

Frequently Asked Questions — Radon in Cleveland

Is radon a real problem in Cleveland?

Yes. Cuyahoga County and surrounding Northeast Ohio counties are in EPA Zone 1. Cleveland's industrial history and older housing stock make radon awareness especially important, as many homes have never been tested despite decades of occupancy. The EPA recommends all homes be tested regardless of location — radon levels can vary significantly even between neighboring properties.

How much does radon mitigation cost in this area?

In the Cleveland area, professional radon mitigation (sub-slab depressurization) typically costs $800–$1,600 installed. This is a one-time cost that reduces radon by 50–99%. The system requires minimal maintenance and a mitigator can typically complete the work in 3–5 hours.

Should I test if I have a new home?

Absolutely. New homes built with radon-resistant features still show elevated levels in testing — construction conditions and local geology vary too much to assume any home is safe. Test within the first year of occupancy, especially if your home has a basement.

Can I test radon myself, or do I need a professional?

DIY testing is reliable and recommended as a first step. Short-term kits ($12–$25) and long-term kits ($20–$35) are accurate when placed and returned correctly. Professional testing is only required for real estate transactions in some states. If your DIY test shows elevated levels, use a certified professional for both confirmation testing and mitigation.