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Radon Levels in Bergen County, New Jersey

EPA puts Bergen County in Zone 2, its middle radon zone, and most reported tests there come back low, though 6.1% of 11,440 (2022) reached 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

    6.1%

    3.6 pts below NJ

    Bergen
    6.1%
    New Jersey
    9.7%

    11,440 tests, 2022

  • Median result

    1.0pCi/L

    Below action level

    Bergen
    1.0 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2022

  • Tests reported

    11,440

    Most tested in New Jersey

    Bergen
    11,440

    Reported to CDC before any fix, 2022

  • 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 New Jersey

    15 of 21

    Middle half

    Bergen
    6.1%
    Warren
    24.6%

    By share, of 21 with 30+ tests

Read a result for Bergen County

Starts at Bergen County's median, 1.0 pCi/L

1.0pCi/L

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

EPA’s reading of 1.0 pCi/L

Below 2 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 below 2 pCi/L, the level at which EPA says a fix should be considered. Bergen County's median reported result, 2022.

Interpret this reading

The data

Bergen County, At a glance

Bergen County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Bergen 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: Low across 97% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Bergen County, 2022

Reported results by concentration band, Bergen County, 2022
Under 2 pCi/L: 79%2 to 4 pCi/L: 15%4 pCi/L and above: 6%

Of 11,440 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Bergen County, 2022: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L9,01478.8%
2 to 4 pCi/L1,73315.1%
4 pCi/L and above6936.1%
What these figures count

These are the 11,440 tests reported to CDC for Bergen County over 2022, many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.

The figures at the top are for 2022: a percentage there is a share of radon tests reported to CDC for Bergen County in 2022, and a percentage in a view below is a share of the tests reported for the year or period it names. It is not a share of homes in Bergen County, and it is not a random sample: it counts only the tests people chose to run and that were reported.

CDC works out the shares and the median over pre-mitigation tests, counting a test not marked as before or after mitigation as one of them (11,440 for 2022). The median is the middle result of those tests, not of buildings. CDC also reports the number of buildings tested (7,647), a different count, so the two totals are not interchangeable.

Measured: CDC tracking data. Figure above: 2022. Measured data period: 2014 to 2022 (every CDC figure on file).

How to read these figures

Bergen County, Compared

Bergen County radon figures, compared

Calculated by Radon411

Bergen County reports fewer high tests than New Jersey overall. 6.1% of its 11,440 tests in 2022 were at or above 4 pCi/L. That is 3.6 points below the 9.7% pooled from 21 New Jersey counties.

Ordered from highest share down, it comes 15th of 21 New Jersey counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 23.9%; Bergen County sits 17.8 points below it.

Next door, the shares run from 3.4% in Hudson County to 7.5% in Passaic County, with Essex County and Hudson County below Bergen County. The reported tests do not follow EPA's Zone 2 label for Bergen County (predicted average between 2 and 4 pCi/L): 6.1% of them reached 4 pCi/L, fewer than that label suggests.

Half the tests came in under 1.0 pCi/L and half over it; the single highest reached 46.7 pCi/L. The rest split 78.8% under 2 pCi/L and 15.1% from 2 to 4 (New Jersey: 74.9% and 15.4%). Year by year, 2014 opened at 6.6% and 2022 closed at 6.1% (about level), with 2020 the high at 7.5%.

The busiest year on file was 2020, with 13,839 tests reported; the quietest, 2014, had 9,657.

Share of reported tests at or above 4 pCi/L by year, Bergen County against New Jersey2014 to 2022, years with 30 or more tests: Bergen County 6.6% to 6.1%, the state's pooled share 9.7% in 2022.
Bergen CountyNew Jersey, pooled
Share of reported tests at or above 4 pCi/L by year, Bergen County against New Jersey: data table
YearTestsBergen County, at or above 4 pCi/LNew Jersey, pooled
20149,6576.6%12.8%
201510,6646.1%12.5%
201611,7516.2%12.5%
201711,2616.9%11.9%
201811,4036.1%11.0%
201912,0326.5%11.2%
202013,8397.5%11.7%
202113,6845.8%10.3%
202211,4406.1%9.7%
Bergen County against New Jersey, the United States and nearby counties, 2022
AreaTestsAt or above 4 pCi/LMedianDifference from Bergen County
Bergen County11,4406.1%1.0 pCi/LThis county
New Jersey, pooled21 counties, pooled108,9349.7%Not pooled+3.6 points
United States, pooled853 counties, pooled333,14023.9%Not pooled+17.8 points
Warren Countyhighest in the state2,81924.6%1.5 pCi/L+18.5 points
Cape May Countylowest in the state2460.0%0.3 pCi/L−6.1 points
Passaic County, NJborders it4,8257.5%0.8 pCi/L+1.4 points
Essex County, NJborders it8,3414.1%0.7 pCi/L−2.0 points
Hudson County, NJborders it2,6553.4%0.5 pCi/L−2.7 points
Westchester County, NYborders it30.0%1.4 pCi/L−6.1 points
Rockland County, NYborders it30.0%0.9 pCi/L−6.1 points
Where Bergen County's reported results fell, 2022, beside New Jersey and the United States
ResultBergen County testsBergen County shareNew Jersey shareU.S. shareAgainst New Jersey
Under 2 pCi/L9,01478.8%74.9%54.5%+3.9 points
2 to 4 pCi/L1,73315.1%15.4%21.7%−0.3 points
4 pCi/L and above6936.1%9.7%23.9%−3.6 points
Bergen County ranked among the 21 New Jersey counties with 30 or more tests, by share at or above 4 pCi/L, 2022
CountyRankTestsAt or above 4 pCi/LMedian
Cumberland County10 of 217528.6%0.9 pCi/L
Passaic County11 of 214,8257.5%0.8 pCi/L
Middlesex County12 of 219,5947.3%0.8 pCi/L
Camden County13 of 216,7616.7%0.9 pCi/L
Burlington County14 of 215,3556.2%0.9 pCi/L
Bergen County15 of 2111,4406.1%1.0 pCi/L
Union County16 of 216,1115.1%0.9 pCi/L
Essex County17 of 218,3414.1%0.7 pCi/L
Hudson County18 of 212,6553.4%0.5 pCi/L
Atlantic County19 of 211,0472.1%0.3 pCi/L
Ocean County20 of 212,6041.8%0.5 pCi/L
Bergen County radon tests by year, against New Jersey's pooled share
YearTestsAt or above 4 pCi/LMedianHighestNew Jersey, pooledChange from the row before
202211,4406.1%1.0 pCi/L46.7 pCi/L9.7%+0.3 points
202113,6845.8%1.0 pCi/L151.0 pCi/L10.3%−1.7 points
202013,8397.5%1.0 pCi/L65.0 pCi/L11.7%+1.0 points
201912,0326.5%1.1 pCi/L56.2 pCi/L11.2%+0.4 points
201811,4036.1%1.0 pCi/L53.6 pCi/L11.0%−0.8 points
201711,2616.9%1.0 pCi/L82.1 pCi/L11.9%+0.7 points
201611,7516.2%1.0 pCi/L31.4 pCi/L12.5%+0.1 points
201510,6646.1%1.0 pCi/L75.4 pCi/L12.5%−0.5 points
20149,6576.6%1.1 pCi/L48.0 pCi/L12.8%First on file

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

Bergen County, Geology

The ground under Bergen County

Predicted

Most of the ground under Bergen County is one class on USGS's geologic map: 97.4% of its land is low radon potential, with 2.6% high. 97.4% of it lies in the area the map calls Northern Piedmont, to which USGS gives a radon index of 8, in the low band (5 to 8).

USGS's geologic areas under Bergen County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Northern PiedmontSandstone, conglomerate, basalt, and shale.Low897.4%
HighlandsGlacial deposits, granite, pegmatites, and gneiss.High152.6%

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

Bergen County beside the ground around it

New Jersey as a whole has more high-potential ground than Bergen County: 29.8% of its land, against 2.6% here. Of the 7 counties that border it, 3 have more high-potential ground, Passaic County the most at 64.3%.

Share of land by USGS radon potential: Bergen County, the 7 counties bordering it and New Jersey
AreaEPA zoneLow potentialModerate potentialHigh potential
Bergen CountyZone 297.4%None2.6%
Bronx County, NYZone 31.1%80.6%None
New York County, NYZone 32.5%84.1%None
Hudson CountyZone 288.6%0.1%None
Passaic CountyZone 235.7%None64.3%
Rockland County, NYZone 356.1%8.1%35.8%
Essex CountyZone 299.4%NoneNone
Westchester County, NYZone 3None84.5%15.2%
New Jersey21 counties, pooled by land areaVaries53.8%13.8%29.8%

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

Local help

Bergen County, Local resources

Local resources in New Jersey

Who to ask in New Jersey: its radon program, test kits and professionals.

Listed radon professionals by town: Englewood Cliffs

What New Jersey's program says
Phone
800-648-0394
Licensing of radon professionals
By law, all businesses and professionals conducting radon testing and mitigation in New Jersey must be certified by the DEP.
Disclosure when a home is sold or rented
Under the law, the seller must provide the buyer, at the time the contract of sale is entered into, with a copy of the results of the radon test and evidence of any mitigation or treatment.

What it means

Bergen County, Questions

Questions about radon in Bergen County

How do I get a radon test in Bergen County?

EPA says you can test your home yourself or hire a qualified radon test company. No radon testing business listed on Radon411 has an address in Bergen County or names it as a service area yet. The New Jersey 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 stateRadon Action Month checklistNew Jersey radon program

Are radon levels high in Bergen County?

In 2022, 6.1% of the radon tests reported to CDC for Bergen County, New Jersey were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.0 pCi/L. That is a share of reported tests, not of homes. EPA places Bergen 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 New Jersey

Who does radon mitigation in Bergen County?

No listed mitigator names Bergen County as a service area yet; the New Jersey directory lists 15 companies. EPA recommends a qualified contractor for the fix, and some states require a licensed or certified professional. Your state radon program is the place to check whether New Jersey requires one.

How radon mitigation worksWhat mitigation costsMitigators in New Jersey

What EPA radon zone is Bergen County in?

EPA places Bergen County, New Jersey 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 Bergen County?

Yes. In 2022, 6.1% of the radon tests reported to CDC for Bergen County, New Jersey were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.0 pCi/L. That is a share of reported tests, not of homes. 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. How to test a home, what testing costs.

Which counties border Bergen County?

Bergen County borders 7 counties: Bronx County, NY, New York County, NY, Hudson County, NJ, Passaic County, NJ, Rockland County, NY, Essex County, NJ and Westchester County, NY. Radon potential follows geology rather than county lines, so a bordering county's report can be relevant.

Products

Bergen County, Products

Testing a home in Bergen County

In Bergen County, 6.1% of 11,440 tests reported to CDC in 2022 reached 4 pCi/L, against 9.7% pooled across New Jersey. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Bergen County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Bergen County homes, compared

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Bergen County, Bordering counties

Counties bordering Bergen County

Calculated by Radon411

Bergen County, Cities and towns

Cities and towns in Bergen County

The Census Bureau estimates 977,026 residents in Bergen County for July 1, 2025, 23,178 more than in 2020 (+2.4%). Packed into its land, that is 4,197 people per square mile. No town dominates: Hackensack, the largest, has 46,380 residents, 4.7% of the total. Together its 61 incorporated places hold 84.5% of those residents; the other 15.5% live outside any of them. CDC's 11,440 reported tests for 2022 work out to 11.7 per 1,000 residents (2025 estimate), close to New Jersey's 11.4.

From Hackensack to Teterboro, CDC publishes no figure by town: each reads Bergen County's.

The 12 largest cities and towns in Bergen County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Hackensack46,380+1.0%4.7%
Fort Lee40,345+0.7%4.1%
Fair Lawn37,128+6.5%3.8%
Garfield33,353+2.4%3.4%
Englewood30,035+2.8%3.1%
Bergenfield28,754+1.6%2.9%
Paramus26,723Level2.7%
Cliffside Park26,539+3.4%2.7%
Ridgewood26,527+2.4%2.7%
Lodi26,187+0.2%2.7%
Elmwood Park21,534+0.9%2.2%
Palisades Park20,317+0.1%2.1%
  • Rutherford
  • Dumont
  • New Milford
  • North Arlington
  • Fairview
  • Edgewater
  • Tenafly
  • Ramsey
  • Ridgefield Park
  • Oakland
  • Glen Rock
  • Hasbrouck Heights
  • River Edge
  • Wallington
  • Ridgefield
  • Westwood
  • Franklin Lakes
  • Little Ferry
  • East Rutherford
  • Wood-Ridge
  • Waldwick
  • Hillsdale
  • Maywood
  • Montvale
The other 25 places in Bergen County
  • Bogota
  • Park Ridge
  • Leonia
  • Cresskill
  • Closter
  • Upper Saddle River
  • Oradell
  • Emerson
  • Allendale
  • Midland Park
  • Old Tappan
  • Carlstadt
  • Woodcliff Lake
  • Norwood
  • Englewood Cliffs
  • Harrington Park
  • Northvale
  • Demarest
  • Ho-Ho-Kus
  • Saddle River
  • Haworth
  • Moonachie
  • Alpine
  • Rockleigh
  • Teterboro

61 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).

Bergen County, Homes

Homes in Bergen County

Fewer than six in ten of Bergen County's 368,535 homes are detached houses (53%, against 53% across New Jersey); the rest are attached, in shared buildings or mobile. The homes are older than New Jersey's as a whole: half were built before 1959 (1969 for New Jersey), and 51% date from before 1960. 65% of occupied homes are lived in by their owner (New Jersey: 64%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Bergen County, New Jersey, 2019 to 2023
HomesBergen CountyNew Jersey
Housing units368,5353,775,842
Detached houses53%53%
In buildings of 5 or more22%22%
Mobile homesunder 1%1%
Built before 196051%38%
Built since 200012%15%
Middle year built19591969
Owner-occupied65%64%

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