Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Cumberland County, New Jersey
EPA puts Cumberland County in Zone 2, its middle radon zone, and most reported tests there come back low, though 8.6% of 752 (2022) reached 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
8.6%
1.1 pts below NJ
- Cumberland
- 8.6%
- New Jersey
- 9.7%
752 tests, 2022
Median result
0.9pCi/L
Below action level
- Cumberland
- 0.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2022
Tests reported
752
19th of 21 by tests
- Cumberland
- 752
- Bergen
- 11,440
Reported to CDC before any fix, 2022
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in New Jersey
10 of 21
Middle half
- Cumberland
- 8.6%
- Warren
- 24.6%
By share, of 21 with 30+ tests
Read a result for Cumberland County
Starts at Cumberland County's median, 0.9 pCi/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
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Cumberland County's median reported result, 2022.
The data
Cumberland County, At a glance
Cumberland County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Cumberland County is a
USGS geologic potential: Low across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Cumberland County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 8.6% |
| 2015 | 12.6% |
| 2016 | 3.2% |
| 2017 | 11.7% |
| 2018 | 9.5% |
| 2019 | 12.0% |
| 2020 | 8.8% |
| 2021 | 9.8% |
| 2022 | 8.6% |
2022: 8.6%. Across these years the share ran from 3.2% to 12.6%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 752 tests reported to CDC for Cumberland 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).
Cumberland County, Compared
Cumberland County radon figures, compared
Calculated by Radon411Cumberland County reports fewer high tests than New Jersey overall. 8.6% of its 752 tests in 2022 were at or above 4 pCi/L. That is 1.1 points below the 9.7% pooled from 21 New Jersey counties.
Ordered from highest share down, it comes 10th 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%; Cumberland County sits 15.3 points below it.
Next door, the shares run from 0.0% in Cape May County to 12.2% in Gloucester County, with Atlantic County and Cape May County below Cumberland County. The reported tests do not follow EPA's Zone 2 label for Cumberland County (predicted average between 2 and 4 pCi/L): 8.6% 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 56.3 pCi/L. The rest split 75.5% under 2 pCi/L and 15.8% from 2 to 4 (New Jersey: 74.9% and 15.4%). Year by year, 2014 opened at 8.6% and 2022 closed at 8.6% (about level), with 2015 the high at 12.6%.
The busiest year on file was 2020, with 904 tests reported; the quietest, 2014, had 198.
Cumberland CountyNew Jersey, pooled
| Year | Tests | Cumberland County, at or above 4 pCi/L | New Jersey, pooled |
|---|---|---|---|
| 2014 | 198 | 8.6% | 12.8% |
| 2015 | 223 | 12.6% | 12.5% |
| 2016 | 536 | 3.2% | 12.5% |
| 2017 | 283 | 11.7% | 11.9% |
| 2018 | 581 | 9.5% | 11.0% |
| 2019 | 523 | 12.0% | 11.2% |
| 2020 | 904 | 8.8% | 11.7% |
| 2021 | 788 | 9.8% | 10.3% |
| 2022 | 752 | 8.6% | 9.7% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Cumberland County, Geology
The ground under Cumberland County
PredictedUSGS's geologic map puts all of Cumberland County's mapped land in one class: low radon potential. All of it lies in the area the map calls Outer Coastal Plain, to which USGS gives a radon index of 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Outer Coastal Plain | Upper Tertiary-Quaternary gravel, sand, silt, clay. | Low | 8 | 99.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Cumberland County beside the ground around it
Across New Jersey 29.8% of the land is rated high; none of Cumberland County's is. Of the 4 counties that border it, 2 have more moderate-potential ground, Gloucester County the most at 32.3%.
The map rates the ground, not the air in any home.
Local help
Cumberland County, Local resources
Radon testing and mitigation in Cumberland County
- Radon SectionRadon Section, run by New Jersey Department of Environmental Protection, licenses or certifies radon professionals, offers free or discounted test kits and states the rule for disclosing radon when a home is sold, and answers questions about testing and mitigation in New Jersey.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Check with your municipal or county health department for free radon test kits or purchase a test kit from a hardware store or a NJ certified radon business.
- Compare kits
- Professionals in New Jersey15 professionals are listed in New Jersey.
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
Cumberland County, Questions
Questions about radon in Cumberland County
Are radon levels high in Cumberland County?
In 2022, 8.6% of the radon tests reported to CDC for Cumberland 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, 9 reported a higher share; pooled, the state comes to 9.7%.
Which counties border Cumberland County?
Cumberland County borders 4 counties: Salem County, Gloucester County, Cape May County and Atlantic County.
Products
Cumberland County, Products
Testing a home in Cumberland County
In Cumberland County, 8.6% of 752 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 Cumberland County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Monitor
RadonScan-Plus USB-powered radon monitor with Wi-Fi
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Cumberland County, Bordering counties
Counties bordering Cumberland County
Calculated by Radon411- Radon levels in Gloucester CountyEPA zone 2
12.2%at or above 4 pCi/L
Median 1.1 pCi/L · 3,333 tests · 3.6 points above Cumberland County
- Radon levels in Salem CountyEPA zone 2
10.8%at or above 4 pCi/L
Median 1.1 pCi/L · 454 tests · 2.2 points above Cumberland County
- Radon levels in Atlantic CountyEPA zone 3
2.1%at or above 4 pCi/L
Median 0.3 pCi/L · 1,047 tests · 6.5 points below Cumberland County
- Radon levels in Cape May CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.3 pCi/L · 246 tests · 8.6 points below Cumberland County
Cumberland County, Cities and towns
Cities and towns in Cumberland County
The Census Bureau estimates 157,148 residents in Cumberland County for July 1, 2025, 3,415 more than in 2020 (+2.2%). That works out to 325 people per square mile of land. Its largest town, Vineland, has 62,703 residents, 39.9% of the total. Together its 4 incorporated places hold 76.1% of those residents; the other 23.9% live outside any of them. Reported testing is thin here: 752 tests over 2022, or 4.8 for every 1,000 residents (2025 estimate), where New Jersey as a whole comes to 11.4.
From Vineland to Shiloh, CDC publishes no figure by town: each reads Cumberland County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Vineland | 62,703 | +3.4% | 39.9% |
| Bridgeton | 28,307 | +4.3% | 18.0% |
| Millville | 28,098 | +2.5% | 17.9% |
| Shiloh | 456 | +3.4% | 0.3% |
4 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).
Cumberland County, Homes
Homes in Cumberland County
Of Cumberland County's 57,203 homes, 67% are detached houses, against 53% across New Jersey; 11% are in buildings of five or more homes. Half of its homes were built before 1968, close to New Jersey's 1969: 39% date from before 1960 and 14% from 2000 or later. 66% 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 | Cumberland County | New Jersey |
|---|---|---|
| Housing units | 57,203 | 3,775,842 |
| Detached houses | 67% | 53% |
| In buildings of 5 or more | 11% | 22% |
| Mobile homes | 5% | 1% |
| Built before 1960 | 39% | 38% |
| Built since 2000 | 14% | 15% |
| Middle year built | 1968 | 1969 |
| Owner-occupied | 66% | 64% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.