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Radon Levels in Cuyahoga County, Ohio

Zone 2Moderate predicted potential459 square miles · 6 bordering counties

What this means for you

  • Your area: EPA rates Cuyahoga County Zone 2, the middle of its three radon zones. That is a prediction for the whole county, and homes with elevated levels occur in all three zones.
  • Local tests: Of 10,092 radon tests reported to CDC for Cuyahoga County (2008 to 2017), 21.7% were at or above 4 pCi/L, EPA's action level.
  • Your home: The only way to know your home’s level is to test it.

pCi/L (picocuries per liter) is the unit radon is measured in. EPA recommends fixing a home at 4 pCi/L or above, its action level.

Over the 2008 to 2017 laboratory totals, 21.7% of the radon tests reported to CDC for Cuyahoga County, Ohio came back at or above the EPA action level of 4 pCi/L, and the median result was 2.0 pCi/L. EPA's Map of Radon Zones places the county in Zone 2, moderate predicted potential. Radon levels vary from home to home, so only a test measures the level in yours.

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

EPA predicts an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³) across the county as a whole.

This is a county-level geologic prediction. It is not a measurement of any address, and houses with elevated radon are found in all three zones.

USGS geologic potential: Moderate across 100% of the county's land area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Cuyahoga County, 2008 to 2017, laboratory

Tests reported
10,092
At or above 4 pCi/L
21.7%
Median result
2.0 pCi/L
Reported results by concentration band, Cuyahoga County, 2008 to 2017, laboratory
Under 2 pCi/L: 48%2 to 4 pCi/L: 31%4 pCi/L and above: 22%

Of 10,092 pre-mitigation tests reported to CDC, not homes in this area. CDC publishes the share in each band, not a count per band, so the per-band counts in the table are calculated by Radon411 and rounded to add up to the published total.

Reported results by concentration band, Cuyahoga County, 2008 to 2017, laboratory: data table
Result bandTests Calculated by Radon411Share Measured
Under 2 pCi/L4,81447.7%
2 to 4 pCi/L3,08830.6%
4 pCi/L and above2,19021.7%

Distribution of tested buildings, not this house. People testing before a sale, or because they suspect a problem, are over-represented in any reported testing data.

Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

Cuyahoga County, In figures

Cuyahoga County in figures

What the published data says about Cuyahoga County, in words. A zone and a share of tests describe an area, never the level in any one home.

    • Predicted

      Predicted

      EPA places Cuyahoga County in Zone 2, moderate predicted potential, as it does 34 other counties of Ohio's 88.

      Of the 6 bordering counties, EPA places Summit County in Zone 1 and Geauga County, Lake County, Lorain County, Medina County and Portage County in Zone 2.

  • Reported tests

    Measured

    CDC publishes no annual figure for Cuyahoga County; its figure is a laboratory total for 2008 to 2017: 21.7% of 10,092 reported tests were at or above 4 pCi/L.

  • Local record

    Ohio's radon program is the Radon Education and Licensing Program, run by Ohio Department of Health; its contacts are under Local resources.

    The county's largest incorporated places are Cleveland, Parma and Lakewood; the figures here cover them as part of the county.

Cuyahoga County, Comparison

How Cuyahoga County compares

Measured

Cuyahoga County's own published CDC figures beside those of the counties that border it, for the same period.

Share of reported tests at or above 4 pCi/L

Measured

2008 to 2017, laboratory, highest first. Each county’s own published CDC figure.

  1. Lorain CountyOH3,307 tests45.4%
  2. Medina CountyOH2,139 tests43.4%
  3. Portage CountyOH1,661 tests39.3%
  4. Summit CountyOH6,486 tests38.7%
  5. Lake CountyOH2,349 tests27.2%
  6. Geauga CountyOH1,469 tests23.4%
  7. Cuyahoga CountyThis page10,092 tests21.7%

Median reported result

Measured

2008 to 2017, laboratory, highest first. Each county’s own published CDC figure.

  1. Lorain CountyOH3,307 tests3.6 pCi/L
  2. Medina CountyOH2,139 tests3.5 pCi/L
  3. Portage CountyOH1,661 tests3.2 pCi/L
  4. Summit CountyOH6,486 tests3.1 pCi/L
  5. Geauga CountyOH1,469 tests2.4 pCi/L
  6. Lake CountyOH2,349 tests2.4 pCi/L
  7. Cuyahoga CountyThis page10,092 tests2.0 pCi/L

Each figure is that county’s own published CDC figure for 2008 to 2017, laboratory, counting radon tests reported to CDC, not homes. Cuyahoga County is this page. Nothing is averaged or combined across counties. The test count beside each county is CDC’s published number of pre-mitigation tests behind its figures. Figures from few tests can swing widely from year to year. Every Ohio county’s own figure is in the Ohio county table.

CDC publishes this figure only for counties here, so there is no state or national number to compare Cuyahoga County, Ohio with.

Cuyahoga County, Bordering counties

Counties bordering Cuyahoga County

Calculated by Radon411

6 counties share a boundary with Cuyahoga County, computed from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county’s report can be worth reading alongside this one.

Cuyahoga County, Local resources

Local resources in Ohio

Who to ask in Ohio: the state's radon program, test kits and professionals.

Radon Education and Licensing Program

Ohio Department of Health

Ohio’s radon program answers questions about testing, mitigation and the rules where you live.

Phone
614-728-0272
Email
indoor.radon@odh.ohio.gov
Licensing of radon professionals
This program licenses companies and persons directly involved with the radon testing and mitigation industry.
Visit the program's page(opens in a new tab)

Test kits

The program says: Free radon test kits are available for Ohio homeowners.

Radon professionals

6 professionals are listed in Ohio.

Professionals in Ohio

Cuyahoga County, Cities and towns

Cities and towns in Cuyahoga County

The radon figures on this page are for Cuyahoga County as a whole. They do not differ by city or town.

  • Lakewood
  • Euclid
  • Strongsville
  • Cleveland Heights
  • Westlake
  • North Olmsted
  • North Royalton
  • Garfield Heights
  • Shaker Heights
  • Solon
  • Maple Heights
  • Rocky River
  • South Euclid
  • Parma Heights
  • Broadview Heights
  • Mayfield Heights
  • Brook Park
  • Berea
  • Fairview Park
  • Bay Village
  • Middleburg Heights
  • Brecksville
  • Beachwood
  • Lyndhurst
The other 31 places in Cuyahoga County
  • Warrensville Heights
  • East Cleveland
  • University Heights
  • Bedford
  • Seven Hills
  • Brooklyn
  • Bedford Heights
  • Richmond Heights
  • Olmsted Falls
  • Highland Heights
  • Independence
  • Pepper Pike
  • Chagrin Falls
  • Orange
  • Moreland Hills
  • Oakwood
  • Mayfield
  • Gates Mills
  • Walton Hills
  • Valley View
  • Newburgh Heights
  • Brooklyn Heights
  • Bratenahl
  • North Randall
  • Glenwillow
  • Bentleyville
  • Highland Hills
  • Hunting Valley (part)
  • Woodmere
  • Cuyahoga Heights
  • Linndale

57 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county.

Cuyahoga County, Questions

Questions about radon in Cuyahoga County

Common questions8 questions, answered from the figures above

Are radon levels high in Cuyahoga County?

In 2017, 21.7% of the radon tests reported to CDC for Cuyahoga County, Ohio were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.0 pCi/L. That is a share of reported tests, not of homes. EPA places Cuyahoga County in Zone 2, moderate predicted potential, a predicted average indoor screening level 2 to 4 pCi/L. Homes with elevated levels occur in all three zones, so the figures describe the area, not your house. Testing is the only way to know the radon level in a specific building.

What a radon level meansRadon in Ohio

How do I get a radon test in Cuyahoga County?

EPA says you can test your home yourself or hire a qualified radon test company, and that either approach takes only a small amount of time and effort. No certified tester listed on Radon411 names Cuyahoga County as a service area yet. The Ohio radon program is the place to ask about certified testers and any test kit offer it runs.

How to test a homeTest kits comparedFree and low-cost kits by stateOhio radon program

Who does radon mitigation in Cuyahoga County?

No listed mitigator names Cuyahoga County as a service area yet; the Ohio directory lists 6 companies. EPA recommends having a qualified contractor fix a home with a radon problem, because lowering high radon levels takes technical knowledge and special skills, and some states require the work to be done by a licensed or certified professional. Your state radon program is the place to check whether Ohio requires one.

How radon mitigation worksWhat mitigation costsMitigators in Ohio

What EPA radon zone is Cuyahoga County in?

EPA places Cuyahoga County, Ohio in Zone 2, which EPA describes as moderate predicted potential for the area. A zone is a prediction for the whole county and never determines whether a particular home should be tested. EPA recommends testing every home regardless of zone.

Should I test my home in Cuyahoga County?

Yes. Testing is the only way to know the radon level in a specific building. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. How to test a home.

When is the best time of year to test?

EPA says short-term tests stay in the home from 2 to 90 days and that all radon tests should run a minimum of 48 hours; long-term tests stay more than 90 days. EPA's guides do not name a best season: they say radon levels tend to vary from day to day and season to season, so a long-term test is more likely than a short-term test to tell you the year-round average.

What does it cost to test?

EPA's Citizen's Guide calls testing easy and inexpensive, and EPA's Home Buyer's and Seller's Guide says passive short-term and long-term devices are generally inexpensive, while active devices may cost more. No national average price is published for this, so Radon411 does not give one. What testing costs.

Which counties border Cuyahoga County?

Cuyahoga County borders 6 counties, derived from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county's report can be relevant.

What these figures mean if you own, buy, sell or rent

The reported-test figures on this page describe Cuyahoga County, Ohio in 2017. They describe tests other people carried out in other buildings, and none of them measures yours.

  • If you own your home

    Test the lowest lived-in level; a short-term kit screens in days, a long-term kit reflects the year.

    How to test a home
  • If you are buying

    Ask for past results and any system's post-mitigation test, and test during the sale.

    Buying a house: radon guide
  • If you are selling

    Testing before you list puts the timing in your hands; disclosure rules differ by state.

    Selling a house: radon guide
  • If you rent, or rent out a home

    A tenant can test; a fix is the owner's to make, and duties differ by state.

    Radon in rental homes

How long a test has to run, under what conditions, and what EPA says a result means: the testing standard, in full.

Cuyahoga County, Products

Testing and mitigation products

Whatever the figures for Cuyahoga County show, only a test tells you about one home.

Cuyahoga County / Next steps

What to do next

Informational. Follow EPA guidance. EPA says all radon tests should be taken for a minimum of 48 hours, with windows and doors closed from 12 hours before a short-term test.