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Radon in Trenton, New Jersey

Trenton, New Jersey lies in Mercer County, which EPA places in Zone 1, highest predicted potential. Radon data is published by county, so this page reads Mercer County's figures.

New JerseyAbout 91,506 people

What this means for you

  • Your area: EPA rates Mercer County, where Trenton is, Zone 1, the highest of its three radon zones. That is a prediction for the whole county, and homes with elevated levels occur in all three zones.
  • Local tests: Of 6,370 radon tests reported to CDC for Mercer County (2022), 10.6% were at or above 4 pCi/L, EPA's action level.
  • Your home: The only way to know your home’s level is to test it.
How to testFind a certified tester

pCi/L (picocuries per liter) is the unit radon is measured in. EPA recommends fixing a home at 4 pCi/L or above, its action level.

Trenton, What is published

What is published for Trenton

Information:

Radon data is published by county, not by city

Radon data is published by county, not by city. EPA assigns radon zones to counties, and CDC publishes radon test figures by county. Neither publishes a figure for Trenton, so every radon figure on this page belongs to a county and is labelled with it. Only a test tells you about one home.

Mercer County has an EPA zone and its own CDC test figures, shown below. About 91,506 people live in Trenton.

Trenton, Counties

The county Trenton lies in

Measured

Each county's own EPA zone and its own published CDC figures for 2022, the newest period any of them has. A county without a figure for that period is shown without one, never with a figure from another year.

Mercer CountyZone 1Highest predicted potential

10.6%
Reported tests at or above 4 pCi/L, 2022
0.9 pCi/L
Median reported result
6,370 tests
Tests reported to CDC
9
Annual years on file

The median reported pre-mitigation result for 2022 was 0.9 pCi/L in Mercer County.

CDC counts radon tests that were reported to it, not homes, and figures from few tests can swing widely from year to year. Each county’s report has its full history.

Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2022.

Trenton, Professionals

Radon professionals listed in Trenton

Businesses whose listed city is Trenton, from the state registries and listings in the Radon411 directory, with the same business and certification status the directory shows.

1 listing with Trenton as the city. See every listing in Trenton, or all radon professionals in New Jersey.

Trenton, Local resources

Local resources for Trenton

Who to ask in New Jersey: the state's radon program, test kits and professionals.

Radon Section

New Jersey Department of Environmental Protection

New Jersey’s radon program answers questions about testing, mitigation and the rules where you live.

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.
Visit the program's page(opens in a new tab)

Test kits

The 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.

Free and low-cost kitsCompare kits

Radon professionals

1 listing covers Trenton.

Professionals in New Jersey

Trenton, Questions

Questions about radon in Trenton

What radon zone is Trenton in?

EPA's Map of Radon Zones classifies counties, not cities. Mercer County is in Zone 1 (highest predicted potential). A zone is a prediction for a whole county and never tells you the level in one home.

How many radon tests come back high in Trenton's counties?

For 2022, the share of radon tests reported to CDC that were at or above 4 pCi/L was 10.6% in Mercer County (6,370 tests). Each is that county's own figure, counting tests reported to CDC, not homes. Radon411 does not average or combine them into a figure for the city.

Should I test my home in Trenton?

Yes. 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. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. How to test a home.

The answers use the published figures of Mercer County, the county Trenton lies in.

Trenton, Keep reading

Keep reading

Trenton / Next steps

What to do next