Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Hudson County, New Jersey
EPA puts Hudson County in Zone 2, its middle radon zone, and most reported tests there come back low, though 3.4% of 2,655 (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
3.4%
6.3 pts below NJ
- Hudson
- 3.4%
- New Jersey
- 9.7%
2,655 tests, 2022
Median result
0.5pCi/L
Below action level
- Hudson
- 0.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2022
Tests reported
2,655
16th of 21 by tests
- Hudson
- 2,655
- 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
18 of 21
Lowest quarter
- Hudson
- 3.4%
- Warren
- 24.6%
By share, of 21 with 30+ tests
Read a result for Hudson County
Starts at Hudson County's median, 0.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.5 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. Hudson County's median reported result, 2022.
The data
Hudson County, At a glance
Hudson County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Hudson County is a
USGS geologic potential: Low across 89% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Hudson County, 2022
Under 2 pCi/L: 88%2 to 4 pCi/L: 9%4 pCi/L and above: 3%
Of 2,655 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 2,330 | 87.8% |
| 2 to 4 pCi/L | 234 | 8.8% |
| 4 pCi/L and above | 91 | 3.4% |
What these figures count
These are the 2,655 tests reported to CDC for Hudson 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 Hudson 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 Hudson 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 (2,655 for 2022). The median is the middle result of those tests, not of buildings. CDC also reports the number of buildings tested (1,393), 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).
Hudson County, Compared
Hudson County radon figures, compared
Calculated by Radon411Only 91 of 2,655 radon tests reported for Hudson County in 2022 reached 4 pCi/L (3.4%). The median result, 0.5 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 17.5 pCi/L.
Across 21 New Jersey counties pooled together, 9.7% of tests reached that level, so Hudson County runs 6.3 points below its state. Against the national pool of 23.9%, the gap is 20.5 points lower. Its place in the state: 18th of 21 New Jersey counties with 30 or more tests for the same period.
The reported tests do not follow EPA's Zone 2 label for Hudson County (predicted average between 2 and 4 pCi/L): 3.4% of them reached 4 pCi/L, fewer than that label suggests. Of 3 neighbours with a figure, all 3 reported a larger share at or above 4 pCi/L; the spread is 4.1% (Essex County) to 6.1% (Bergen County).
Below the action level, 2,330 tests (87.8%) came in under 2 pCi/L, against 74.9% statewide, and 234 tests (8.8%) fell between 2 and 4, against 15.4% statewide. Over 9 years of annual figures the share held within 2 points, from 3.0% in 2014 to 3.4% in 2022; its peak was 3.6% in 2019. USGS geology rates 89% of the county's land low radon potential.
The busiest year on file was 2020, with 3,000 tests reported; the quietest, 2015, had 1,830.
Hudson CountyNew Jersey, pooled
| Year | Tests | Hudson County, at or above 4 pCi/L | New Jersey, pooled |
|---|---|---|---|
| 2014 | 1,889 | 3.0% | 12.8% |
| 2015 | 1,830 | 3.3% | 12.5% |
| 2016 | 2,037 | 2.3% | 12.5% |
| 2017 | 2,119 | 3.2% | 11.9% |
| 2018 | 2,313 | 1.7% | 11.0% |
| 2019 | 1,892 | 3.6% | 11.2% |
| 2020 | 3,000 | 3.6% | 11.7% |
| 2021 | 2,502 | 2.5% | 10.3% |
| 2022 | 2,655 | 3.4% | 9.7% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Hudson County, Geology
The ground under Hudson County
PredictedMost of the ground under Hudson County is one class on USGS's geologic map: 88.6% of its land is low radon potential, with 0.1% moderate. 88.6% 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).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Northern Piedmont | Sandstone, conglomerate, basalt, and shale. | Low | 8 | 88.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Hudson County beside the ground around it
Across New Jersey 29.8% of the land is rated high; none of Hudson County's is. Of the 5 counties that border it, 2 have more high-potential ground, Union County the most at 19.5%.
The map rates the ground, not the air in any home.
Local help
Hudson County, Local resources
Local resources in New Jersey
Who to ask in New Jersey: its radon program, test kits and professionals.
- 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.
Listed radon professionals by town: Jersey City
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
Hudson County, Questions
Questions about radon in Hudson County
Are radon levels high in Hudson County?
In 2022, 3.4% of the radon tests reported to CDC for Hudson County, New Jersey were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.5 pCi/L. That is a share of reported tests, not of homes. EPA places Hudson 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.
How do I get a radon test in Hudson 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 Hudson 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
Who does radon mitigation in Hudson County?
No listed mitigator names Hudson 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 Hudson County in?
EPA places Hudson 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 Hudson County?
Yes. In 2022, 3.4% of the radon tests reported to CDC for Hudson County, New Jersey were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.5 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 Hudson County?
Hudson County borders 5 counties: New York County, NY, Richmond County, NY, Essex County, NJ, Union County, NJ and Bergen County, NJ. Radon potential follows geology rather than county lines, so a bordering county's report can be relevant.
Products
Hudson County, Products
Testing a home in Hudson County
In Hudson County, 3.4% of 2,655 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 Hudson 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
RadonPro Wi-Fi radon monitor with a built-in Geiger counter
- 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
Hudson County, Bordering counties
Counties bordering Hudson County
Calculated by Radon411- Radon levels in Bergen County, NJEPA zone 2
6.1%at or above 4 pCi/L
Median 1.0 pCi/L · 11,440 tests · 2.7 points above Hudson County
- Radon levels in Union County, NJEPA zone 2
5.1%at or above 4 pCi/L
Median 0.9 pCi/L · 6,111 tests · 1.7 points above Hudson County
- Radon levels in Essex County, NJEPA zone 2
4.1%at or above 4 pCi/L
Median 0.7 pCi/L · 8,341 tests · 0.7 points above Hudson County
- Radon levels in New York County, NYEPA zone 3
No CDC figure for 2022; its page reads it against its own neighbours.
- Radon levels in Richmond County, NYEPA zone 3
No CDC figure for 2022; its page reads it against its own neighbours.
Hudson County, Cities and towns
Cities and towns in Hudson County
The Census Bureau estimates 735,033 residents in Hudson County for July 1, 2025, 13,233 more than in 2020 (+1.8%). Packed into its land, that is 15,912 people per square mile. Its largest town, Jersey City, has 302,013 residents, 41.1% of the total. Together its 10 incorporated places hold 89.2% of those residents; the other 10.8% live outside any of them. Reported testing is thin here: 2,655 tests over 2022, or 3.6 for every 1,000 residents (2025 estimate), where New Jersey as a whole comes to 11.4.
From Jersey City to East Newark, CDC publishes no figure by town: each reads Hudson County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Jersey City | 302,013 | +3.4% | 41.1% |
| Bayonne | 74,744 | +4.4% | 10.2% |
| Union City | 66,656 | −2.1% | 9.1% |
| Hoboken | 59,027 | −1.5% | 8.0% |
| West New York | 53,192 | +1.4% | 7.2% |
| Kearny | 40,862 | −2.0% | 5.6% |
| Secaucus | 22,640 | +3.0% | 3.1% |
| Harrison | 22,105 | +13.5% | 3.0% |
| Guttenberg | 11,910 | −0.8% | 1.6% |
| East Newark | 2,574 | +0.5% | 0.4% |
10 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).
Hudson County, Homes
Homes in Hudson County
Hudson County has 317,032 homes, and many share a building: 52% are in buildings of five or more, 9% are detached houses, against 53% across New Jersey. Half of its homes were built before 1965, close to New Jersey's 1969: 45% date from before 1960 and 23% from 2000 or later. Most occupied homes here are rented: owners live in 31% (New Jersey: 64%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Hudson County | New Jersey |
|---|---|---|
| Housing units | 317,032 | 3,775,842 |
| Detached houses | 9% | 53% |
| In buildings of 5 or more | 52% | 22% |
| Mobile homes | under 1% | 1% |
| Built before 1960 | 45% | 38% |
| Built since 2000 | 23% | 15% |
| Middle year built | 1965 | 1969 |
| Owner-occupied | 31% | 64% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.