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Radon Levels in Crawford County, Pennsylvania

EPA puts Crawford County in Zone 2, its middle radon zone, and 29.9% of its 221 reported radon tests (2020) were at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    29.9%

    0.4 pts below PA

    Crawford
    29.9%
    PA
    30.3%

    221 tests, 2020

  • Median result

    2.6pCi/L

    Below action level

    Crawford
    2.6 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2020

  • Tests reported

    221

    42nd of 63 by tests

    Crawford
    221
    Montgomery
    10,508

    Reported to CDC before any fix, 2020

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

  • Rank in PA

    51 of 63

    Lowest quarter

    Crawford
    29.9%
    Perry
    57.7%

    By share, of 63 with 30+ tests

Read a result for Crawford County

Starts at Crawford County's median, 2.6 pCi/L

2.6pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 2.6 pCi/L

Between 2 and 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Crawford County's median reported result, 2020.

Interpret this readingWhat a fix costs

The data

Crawford County, At a glance

Crawford County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Crawford County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: Moderate across 96% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Crawford County, 2020

Share of reported tests at or above 4 pCi/L, by year, Crawford County
Share of reported tests at or above 4 pCi/L, by year, Crawford County
YearShare of reported tests at or above 4 pCi/L
201428.8%
201534.4%
201632.4%
201732.9%
201833.8%
201931.0%
202029.9%

2020: 29.9%. Across these years the share ran from 28.8% to 34.4%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 221 tests reported to CDC for Crawford County over 2020, many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.

Measured: CDC tracking data. Figure above: 2020. Measured data period: 2005 to 2020 (every CDC figure on file).

How to read these figures

Crawford County, Compared

Crawford County radon figures, compared

Calculated by Radon411

Crawford County's 221 reported tests in 2020 had a middle value of 2.6 pCi/L and a maximum of 90.9 pCi/L, and 29.9% reached 4 pCi/L. Pennsylvania as a whole (67 Pennsylvania counties, pooled) comes to 30.3%: 0.4 points higher than here.

Among its state's counties it ranks 51st of 63 Pennsylvania counties with 30 or more tests for the same period. Statewide for the same period, Perry County reported the highest share (57.7%) and Philadelphia County the lowest (10.6%).

Below the action level, 79 tests (35.7%) came in under 2 pCi/L, against 44.3% statewide, and 76 tests (34.4%) fell between 2 and 4, against 25.4% statewide. The busiest year on file was 2016, with 250 tests reported; the quietest, 2017, had 164.

EPA's 1993 zone map puts Crawford County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 96% of the county's land moderate radon potential.

Next door, the shares run from 22.2% in Erie County to 38.7% in Warren County, with Erie County below Crawford County. Over 7 years of annual figures the share held within 2 points, from 28.8% in 2014 to 29.9% in 2020; its peak was 34.4% in 2015.

Share of reported tests at or above 4 pCi/L by year, Crawford County against Pennsylvania2014 to 2020, years with 30 or more tests: Crawford County 28.8% to 29.9%, the state's pooled share 30.3% in 2020.
Crawford CountyPennsylvania, pooled
Share of reported tests at or above 4 pCi/L by year, Crawford County against Pennsylvania: data table
YearTestsCrawford County, at or above 4 pCi/LPennsylvania, pooled
201420828.8%36.1%
201524734.4%37.8%
201625032.4%34.4%
201716432.9%35.1%
201821633.8%30.5%
201922931.0%31.4%
202022129.9%30.3%
Crawford County against Pennsylvania, the United States and nearby counties, 2020
AreaTestsAt or above 4 pCi/LMedianDifference from Crawford County
Crawford County22129.9%2.6 pCi/LThis county
Pennsylvania, pooled67 counties, pooled93,66930.3%Not pooled+0.4 points
United States, pooled915 counties, pooled405,35525.5%Not pooled−4.4 points
Perry Countyhighest in the state18957.7%4.9 pCi/L+27.8 points
Philadelphia Countylowest in the state8,44210.6%1.7 pCi/L−19.3 points
Warren County, PAborders it11938.7%2.8 pCi/L+8.8 points
Venango County, PAborders it17934.1%3.0 pCi/L+4.2 points
Mercer County, PAborders it31831.4%2.5 pCi/L+1.5 points
Erie County, PAborders it1,16222.2%1.9 pCi/L−7.7 points
Where Crawford County's reported results fell, 2020, beside Pennsylvania and the United States
ResultCrawford County testsCrawford County sharePennsylvania shareU.S. shareAgainst Pennsylvania
Under 2 pCi/L7935.7%44.3%51.6%−8.6 points
2 to 4 pCi/L7634.4%25.4%22.9%+9.0 points
4 pCi/L and above6629.9%30.3%25.5%−0.4 points
Crawford County ranked among the 63 Pennsylvania counties with 30 or more tests, by share at or above 4 pCi/L, 2020
CountyRankTestsAt or above 4 pCi/LMedian
Wyoming County46 of 6312330.9%2.0 pCi/L
Pike County47 of 631,15830.7%2.2 pCi/L
Monroe County48 of 631,64930.7%2.1 pCi/L
Allegheny County49 of 638,33730.5%2.5 pCi/L
Wayne County50 of 6360730.1%2.3 pCi/L
Crawford County51 of 6322129.9%2.6 pCi/L
Sullivan County52 of 633129.0%2.0 pCi/L
Luzerne County53 of 6399128.2%2.0 pCi/L
Lackawanna County54 of 6377627.1%2.1 pCi/L
Chester County55 of 636,77024.0%2.0 pCi/L
Bucks County56 of 637,06623.2%2.0 pCi/L
Crawford County radon tests by year, against Pennsylvania's pooled share
YearTestsAt or above 4 pCi/LMedianHighestPennsylvania, pooledChange from the row before
202022129.9%2.6 pCi/L90.9 pCi/L30.3%−1.1 points
201922931.0%2.6 pCi/L34.5 pCi/L31.4%−2.8 points
201821633.8%2.7 pCi/L38.4 pCi/L30.5%+0.9 points
201716432.9%2.5 pCi/L54.0 pCi/L35.1%+0.5 points
201625032.4%2.7 pCi/L20.9 pCi/L34.4%−2.0 points
201524734.4%2.8 pCi/L75.6 pCi/L37.8%+5.6 points
201420828.8%2.1 pCi/L54.2 pCi/L36.1%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Crawford County, State data

Pennsylvania's own radon test data

Measured

What Pennsylvania's own agencies publish about radon tests in Crawford County, with their period. These are not CDC's figures and are never added to them.

MeasuredState figures, not CDC's

What Pennsylvania DEP reports for the ZIP codes in Crawford County

Pennsylvania DEP publishes its figures by ZIP code, not by county. These are the 27 ZIP codes that lie wholly or partly in Crawford County, each with the state's own figures for it. Period: Period not stated by DEP.

ZIP codes in Crawford County
ZIP codeWhat the state reports
16110Basement: figures not shown; First floor: figures not shown
16111Basement: figures not shown; First floor: figures not shown
16125Basement: average 5.3 pCi/L, 825 tests; First floor: average 2.3 pCi/L, 167 tests
16131Basement: figures not shown; First floor: figures not shown
16134Basement: average 5.2 pCi/L, 114 tests; First floor: figures not shown
16314Basement: average 8.4 pCi/L, 204 tests; First floor: figures not shown
16316Basement: average 5.1 pCi/L, 490 tests; First floor: average 4.5 pCi/L, 47 tests
16317Basement: figures not shown; First floor: figures not shown
16327Basement: average 4.3 pCi/L, 67 tests; First floor: figures not shown
16328Basement: figures not shown; First floor: figures not shown
16335Basement: average 4.0 pCi/L, 1,862 tests; First floor: average 1.8 pCi/L, 313 tests
16354Basement: average 9.7 pCi/L, 297 tests; First floor: average 4.6 pCi/L, 53 tests
16360Basement: figures not shown; First floor: figures not shown
16401Basement: average 3.5 pCi/L, 167 tests; First floor: figures not shown
16403Basement: average 4.4 pCi/L, 252 tests; First floor: average 1.6 pCi/L, 81 tests
16404Basement: average 8.8 pCi/L, 67 tests; First floor: figures not shown
16406Basement: average 3.7 pCi/L, 67 tests; First floor: figures not shown
16407Basement: average 5.5 pCi/L, 695 tests; First floor: average 3.0 pCi/L, 102 tests
16412Basement: average 6.2 pCi/L, 1,533 tests; First floor: average 3.1 pCi/L, 276 tests
16422Basement: figures not shown; First floor: figures not shown
16424Basement: average 3.1 pCi/L, 111 tests; First floor: figures not shown
16433Basement: average 4.4 pCi/L, 249 tests; First floor: average 2.9 pCi/L, 41 tests
16434Basement: figures not shown; First floor: figures not shown
16435Basement: figures not shown; First floor: figures not shown
16438Basement: average 4.5 pCi/L, 235 tests; First floor: average 1.9 pCi/L, 76 tests
16440Basement: average 4.9 pCi/L, 42 tests; First floor: figures not shown
16441Basement: average 4.8 pCi/L, 719 tests; First floor: average 2.4 pCi/L, 76 tests
  • DEP's report gives the number of tests, the highest result and the average result for each floor tested; it states no period.
  • DEP says the smartest thing to do is to test your home for radon, no matter where you live.
  • A ZIP code that crosses the county line is listed whole; its figures cover all of it.

Measured: Pennsylvania DEP data, Period not stated by DEP.

Crawford County, Geology

The ground under Crawford County

Predicted

Most of the ground under Crawford County is one class on USGS's geologic map: 96.1% of its land is moderate radon potential, with 3.9% high. 96.0% of it lies in the area the map calls Glaciated Pittsburgh Plateau, to which USGS gives a radon index of 11, in the moderate band (9 to 11).

USGS's geologic areas under Crawford County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Glaciated Pittsburgh PlateauLate-Wisconsin till overlying sandstone, shale, limestone, and coal.Moderate1196.0%
Pennsylvanian Rocks of the Pittsburgh Low PlateauPennsylvanian marine shale, siltstone, sandstone, limestone, and coal.High143.9%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Crawford County beside the ground around it

Pennsylvania as a whole has more high-potential ground than Crawford County: 70.4% of its land, against 3.9% here. Of the 6 counties that border it, 1 has more high-potential ground, Venango County the most at 92.4%.

Share of land by USGS radon potential: Crawford County, the 6 counties bordering it and Pennsylvania
AreaEPA zoneLow potentialModerate potentialHigh potential
Crawford CountyZone 2None96.1%3.9%
Erie CountyZone 2None98.7%0.2%
Venango CountyZone 1None7.6%92.4%
Mercer CountyZone 2None99.1%0.9%
Ashtabula County, OHZone 2None99.9%None
Warren CountyZone 2None96.6%3.4%
Trumbull County, OHZone 2None100%None
Pennsylvania67 counties, pooled by land areaVaries0.7%28.9%70.4%

The map rates the ground, not the air in any home.

Local help

Crawford County, Local resources

Radon testing and mitigation in Crawford County

What Pennsylvania's program says
Phone
800-237-2366
Licensing of radon professionals
The Radon Certification Act requires DEP to establish by regulation, a certification program for persons conducting radon gas and radon progeny testing, laboratory analysis and mitigation of radon contamination in buildings.

What it means

Crawford County, Questions

Questions about radon in Crawford County

Are radon levels high in Crawford County?

In 2020, 29.9% of the radon tests reported to CDC for Crawford County, Pennsylvania were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.6 pCi/L. Of 63 Pennsylvania counties with 30 or more tests for the same period, 50 reported a higher share; pooled, the state comes to 30.3%.

Which counties border Crawford County?

Crawford County borders 6 counties: Erie County, PA, Venango County, PA, Mercer County, PA, Ashtabula County, OH, Warren County, PA and Trumbull County, OH.

Products

Crawford County, Products

Testing a home in Crawford County

In Crawford County, 29.9% of 221 tests reported to CDC in 2020 reached 4 pCi/L, against 30.3% pooled across Pennsylvania. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Crawford County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Crawford County homes, compared

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Crawford County, Bordering counties

Counties bordering Crawford County

Calculated by Radon411

Crawford County, Cities and towns

Cities and towns in Crawford County

About 81,792 people live in Crawford County by the Census Bureau's estimate for July 1, 2025, 2,005 fewer than in 2020 (−2.4%). That works out to 81 people per square mile of land. No town dominates: Meadville, the largest, has 12,230 residents, 15.0% of the total. Together its 16 incorporated places hold 32.1% of those residents; the other 67.9% live outside any of them. Reported testing is thin here: 221 tests over 2020, or 2.7 for every 1,000 residents (2025 estimate), where Pennsylvania as a whole comes to 7.2.

From Meadville to Woodcock, CDC publishes no figure by town: each reads Crawford County's.

The 12 largest cities and towns in Crawford County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Meadville12,230−5.8%15.0%
Titusville5,112−2.7%6.3%
Cambridge Springs2,361−8.1%2.9%
Cochranton1,090−2.6%1.3%
Linesville932−2.6%1.1%
Saegertown840−2.8%1.0%
Conneautville713−2.5%0.9%
Conneaut Lake609−2.4%0.7%
Hydetown514−1.5%0.6%
Springboro366−1.9%0.4%
Blooming Valley350+0.9%0.4%
Townville315−3.1%0.4%
  • Spartansburg
  • Venango
  • Centerville
  • Woodcock

16 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Crawford County, Homes

Homes in Crawford County

Of Crawford County's 42,188 homes, 73% are detached houses, against 57% across Pennsylvania; 12% are mobile homes. Half of its homes were built before 1966, close to Pennsylvania's 1965: 44% date from before 1960 and 11% from 2000 or later. 74% of occupied homes are lived in by their owner (Pennsylvania: 69%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Crawford County, Pennsylvania, 2019 to 2023
HomesCrawford CountyPennsylvania
Housing units42,1885,779,663
Detached houses73%57%
In buildings of 5 or more6%13%
Mobile homes12%4%
Built before 196044%45%
Built since 200011%14%
Middle year built19661965
Owner-occupied74%69%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.