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Radon Levels in Burlington County, New Jersey

EPA puts Burlington County in Zone 2, its middle radon zone, and most reported tests there come back low, though 6.2% of 5,355 (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

    6.2%

    3.5 pts below NJ

    Burlington
    6.2%
    New Jersey
    9.7%

    5,355 tests, 2022

  • Median result

    0.9pCi/L

    Below action level

    Burlington
    0.9 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2022

  • Tests reported

    5,355

    10th of 21 by tests

    Burlington
    5,355
    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

    14 of 21

    Middle half

    Burlington
    6.2%
    Warren
    24.6%

    By share, of 21 with 30+ tests

Read a result for Burlington County

Starts at Burlington County's median, 0.9 pCi/L

0.9pCi/L

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

EPA’s reading of 0.9 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. Burlington County's median reported result, 2022.

Interpret this reading

The data

Burlington County, At a glance

Burlington County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Burlington 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 76% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Burlington County, 2022

Share of reported tests at or above 4 pCi/L, by year, Burlington County
Share of reported tests at or above 4 pCi/L, by year, Burlington County
YearShare of reported tests at or above 4 pCi/L
20149.1%
20157.9%
20169.0%
20177.6%
20186.2%
20196.4%
20207.0%
20216.6%
20226.2%

2022: 6.2%. Across these years the share ran from 6.2% to 9.1%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 5,355 tests reported to CDC for Burlington County over 2022, 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: 2022. Measured data period: 2014 to 2022 (every CDC figure on file).

How to read these figures

Burlington County, Compared

Burlington County radon figures, compared

Calculated by Radon411

Burlington County reports fewer high tests than New Jersey overall. 6.2% of its 5,355 tests in 2022 were at or above 4 pCi/L. That is 3.5 points below the 9.7% pooled from 21 New Jersey counties.

Ordered from highest share down, it comes 14th 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%; Burlington County sits 17.7 points below it.

Next door, the shares run from 1.8% in Ocean County to 10.6% in Mercer County, with Atlantic County and Ocean County below Burlington County. The reported tests do not follow EPA's Zone 2 label for Burlington County (predicted average between 2 and 4 pCi/L): 6.2% of them reached 4 pCi/L, fewer than that label suggests.

Half the tests came in under 0.9 pCi/L and half over it; the single highest reached 26.0 pCi/L. The rest split 77.0% under 2 pCi/L and 16.8% from 2 to 4 (New Jersey: 74.9% and 15.4%). Year by year, 2014 opened at 9.1% and 2022 closed at 6.2% (down 2.9 points), with 2014 the high at 9.1%.

The busiest year on file was 2020, with 6,785 tests reported; the quietest, 2014, had 3,068.

Share of reported tests at or above 4 pCi/L by year, Burlington County against New Jersey2014 to 2022, years with 30 or more tests: Burlington County 9.1% to 6.2%, the state's pooled share 9.7% in 2022.
Burlington CountyNew Jersey, pooled
Share of reported tests at or above 4 pCi/L by year, Burlington County against New Jersey: data table
YearTestsBurlington County, at or above 4 pCi/LNew Jersey, pooled
20143,0689.1%12.8%
20153,6897.9%12.5%
20163,8789.0%12.5%
20174,5757.6%11.9%
20185,0906.2%11.0%
20195,1126.4%11.2%
20206,7857.0%11.7%
20216,2946.6%10.3%
20225,3556.2%9.7%
Burlington County against New Jersey, the United States and nearby counties, 2022
AreaTestsAt or above 4 pCi/LMedianDifference from Burlington County
Burlington County5,3556.2%0.9 pCi/LThis county
New Jersey, pooled21 counties, pooled108,9349.7%Not pooled+3.5 points
United States, pooled853 counties, pooled333,14023.9%Not pooled+17.7 points
Warren Countyhighest in the state2,81924.6%1.5 pCi/L+18.4 points
Cape May Countylowest in the state2460.0%0.3 pCi/L−6.2 points
Mercer County, NJborders it6,37010.6%0.9 pCi/L+4.4 points
Monmouth County, NJborders it9,7459.8%0.7 pCi/L+3.6 points
Camden County, NJborders it6,7616.7%0.9 pCi/L+0.5 points
Atlantic County, NJborders it1,0472.1%0.3 pCi/L−4.1 points
Ocean County, NJborders it2,6041.8%0.5 pCi/L−4.4 points
Where Burlington County's reported results fell, 2022, beside New Jersey and the United States
ResultBurlington County testsBurlington County shareNew Jersey shareU.S. shareAgainst New Jersey
Under 2 pCi/L4,12577.0%74.9%54.5%+2.1 points
2 to 4 pCi/L89916.8%15.4%21.7%+1.4 points
4 pCi/L and above3316.2%9.7%23.9%−3.5 points
Burlington 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
Monmouth County9 of 219,7459.8%0.7 pCi/L
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
Burlington County radon tests by year, against New Jersey's pooled share
YearTestsAt or above 4 pCi/LMedianHighestNew Jersey, pooledChange from the row before
20225,3556.2%0.9 pCi/L26.0 pCi/L9.7%−0.4 points
20216,2946.6%1.0 pCi/L48.7 pCi/L10.3%−0.4 points
20206,7857.0%0.9 pCi/L41.0 pCi/L11.7%+0.6 points
20195,1126.4%1.1 pCi/L135.5 pCi/L11.2%+0.2 points
20185,0906.2%0.9 pCi/L73.7 pCi/L11.0%−1.4 points
20174,5757.6%1.1 pCi/L64.8 pCi/L11.9%−1.4 points
20163,8789.0%1.1 pCi/L23.4 pCi/L12.5%+1.1 points
20153,6897.9%1.2 pCi/L36.1 pCi/L12.5%−1.2 points
20143,0689.1%1.1 pCi/L29.9 pCi/L12.8%First on file

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

Burlington County, Geology

The ground under Burlington County

Predicted

Most of the ground under Burlington County is one class on USGS's geologic map: 76.3% of its land is low radon potential, with 23.7% moderate. The map puts 76.3% of Burlington County in the area it calls Outer Coastal Plain and 23.7% in Inner Coastal Plain. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 10, in the moderate band (9 to 11).

USGS's geologic areas under Burlington County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Outer Coastal PlainUpper Tertiary-Quaternary gravel, sand, silt, clay.Low876.3%
Inner Coastal PlainCretaceous-Lower Tertiary gravel, sand, silt, clay.Moderate1023.7%

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

Burlington County beside the ground around it

Across New Jersey 29.8% of the land is rated high; none of Burlington County's is. Of the 7 counties that border it, 3 have more high-potential ground, Bucks County, PA the most at 89.0%.

Share of land by USGS radon potential: Burlington County, the 7 counties bordering it and New Jersey
AreaEPA zoneLow potentialModerate potentialHigh potential
Burlington CountyZone 276.3%23.7%None
Camden CountyZone 274.2%25.8%None
Ocean CountyZone 383.9%NoneNone
Atlantic CountyZone 390.8%NoneNone
Philadelphia County, PAZone 3None63.6%36.5%
Mercer CountyZone 1None49.5%50.5%
Monmouth CountyZone 160.3%36.5%None
Bucks County, PAZone 1None11.0%89.0%
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

Burlington County, Local resources

Radon testing and mitigation in Burlington County

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

Burlington County, Questions

Questions about radon in Burlington County

Are radon levels high in Burlington County?

In 2022, 6.2% of the radon tests reported to CDC for Burlington County, New Jersey were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.9 pCi/L. Of 21 New Jersey counties with 30 or more tests for the same period, 13 reported a higher share; pooled, the state comes to 9.7%.

Which counties border Burlington County?

Burlington County borders 7 counties: Camden County, NJ, Ocean County, NJ, Atlantic County, NJ, Philadelphia County, PA, Mercer County, NJ, Monmouth County, NJ and Bucks County, PA.

Products

Burlington County, Products

Testing a home in Burlington County

In Burlington County, 6.2% of 5,355 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 Burlington County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Burlington County homes, compared

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Burlington County, Bordering counties

Counties bordering Burlington County

Calculated by Radon411

Burlington County, Cities and towns

Cities and towns in Burlington County

The Census Bureau estimates 481,439 residents in Burlington County for July 1, 2025, 19,739 more than in 2020 (+4.3%). That works out to 602 people per square mile of land. No town dominates: Burlington, the largest, has 10,243 residents, 2.1% of the total. Together its 9 incorporated places hold 7.2% of those residents; the other 92.8% live outside any of them. CDC's 5,355 reported tests for 2022 work out to 11.1 per 1,000 residents (2025 estimate), close to New Jersey's 11.4.

From Burlington to Fieldsboro, CDC publishes no figure by town: each reads Burlington County's.

The cities and towns in Burlington County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Burlington10,243+5.3%2.1%
Palmyra7,664+3.0%1.6%
Medford Lakes4,403+3.2%0.9%
Bordentown4,108+2.9%0.9%
Riverton2,842+3.1%0.6%
Beverly2,564+3.0%0.5%
Pemberton1,406+2.9%0.3%
Wrightstown746+3.0%0.2%
Fieldsboro553+3.8%0.1%

9 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).

Burlington County, Homes

Homes in Burlington County

Of Burlington County's 185,617 homes, 64% are detached houses, against 53% across New Jersey; 14% are in buildings of five or more homes. Much of Burlington County is recent building: 17% of its homes have gone up since 2000 and the middle year built is 1977, against 1969 for New Jersey. Owners live in 76% of the occupied homes (New Jersey: 64%), so for most households a test and a fix are their own to order.

Homes in Burlington County, New Jersey, 2019 to 2023
HomesBurlington CountyNew Jersey
Housing units185,6173,775,842
Detached houses64%53%
In buildings of 5 or more14%22%
Mobile homes1%1%
Built before 196025%38%
Built since 200017%15%
Middle year built19771969
Owner-occupied76%64%

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