Listed for: Mitigation
Verified:Pennsylvania state license
No phone or website on the list. Licenses on the profile.
Locations and reports
Radon in Trenton, New Jersey
EPA puts Mercer County, where Trenton is, in Zone 1, its highest radon zone, and most reported tests there come back low, though 10.6% of 6,370 (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
10.6%
0.9 pts above NJ
- Mercer
- 10.6%
- New Jersey
- 9.7%
Mercer, 8th of 21 in NJ, 2022
Median result
0.9pCi/L
Below action level
- Mercer
- 0.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of Mercer's tests, 2022
Nearest county
7.3%
Middlesex, 24 miles
- Middlesex
- 7.3%
- Mercer
- 10.6%
9,594 tests, 2022
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
Mercer, where Trenton is
Tests reported
6,370
In Mercer
- Mercer
- 6,370
- Middlesex
- 9,594
Reported to CDC before any fix, 2022
Read a result for Trenton
Starts at Mercer 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. Mercer County's median reported result, 2022.
The data
Trenton, What is published
What is published for Trenton
Information:
Every figure for Trenton is a county's
Radon data is published by county, not by city, so for Trenton it is Mercer County's: its EPA zone (Zone 1) and the 6,370 tests reported to CDC for 2022. Only a test tells you about one home.
Trenton covers 7.6 square miles of land, all of it in Mercer County. Its 91,506 residents live 12,074 to the square mile.
Trenton, Counties
The county Trenton lies in
MeasuredMercer County's EPA zone and the figures CDC publishes for it, 2022.
Mercer CountyZone 1Highest predicted potential
- 10.6%
- Reported tests at or above 4 pCi/L
- 0.9 pCi/L
- Median reported result
- 6,370 tests
- Tests reported to CDC
- 9
- Annual years on file
Mercer County ranks 8th of 21 New Jersey counties with 30 or more tests for that period, 0.9 points above the 9.7% pooled across New Jersey's counties, 13.3 points below the national pool of 23.9%.
Measured from the middle of Trenton, the nearest counties with a CDC figure for 2022 are Middlesex County (24 miles, 7.3% of 9,594 tests), Burlington County (24 miles, 6.2% of 5,355 tests) and Somerset County (25 miles, 15.4% of 7,679 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 1.8% to 21.1%; the farthest of them, Union County, is 39 miles away at 5.1%.
The directory lists 1 business with an address in Trenton, 1 for mitigation. New Jersey's other cities with a page of their own: Freehold.
The counties around Trenton
By distance from the middle of Trenton; counties with 30 or more tests.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2022.
Trenton, Geology
The ground under Trenton
PredictedMost of the ground under Trenton is one class on USGS's geologic map: 82.5% of its land is moderate radon potential, with 17.5% high. The map puts 81.7% of Trenton in the area it calls Inner Coastal Plain and 16.4% in Southern Piedmont, with 2 smaller areas beside them. USGS gives the first a radon index of 10, in the moderate band (9 to 11), and the second 14, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Inner Coastal Plain | Cretaceous-Lower Tertiary gravel, sand, silt, clay. | Moderate | 10 | 81.7% |
| Southern Piedmont | Black shale, sandstone and siltstone. | High | 14 | 16.4% |
| Newark Basin | Gray shale and fluvial sandstone. | High | 12 | 1.2% |
| Atlantic Coastal Plain | Glacial deposits and marine sediments. | Moderate | 10 | 0.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Trenton beside its county and New Jersey
Mercer County as a whole has more high-potential ground than Trenton: 50.5% of the county against 17.5% of the city. New Jersey as a whole has more high-potential ground than Trenton: 29.8% of its land, against 17.5% here.
The map rates the ground, not the air in any home.
Trenton, Homes
Homes in Trenton
Fewer than six in ten of Trenton's 35,871 homes are detached houses (15%, against 47% across Mercer County); the rest are attached, in shared buildings or mobile. The homes are older than Mercer County's as a whole: half were built before 1950 (1967 for Mercer County), and 65% date from before 1960. Most occupied homes here are rented: owners live in 36% (Mercer County: 62%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Trenton | Mercer County | New Jersey |
|---|---|---|---|
| Housing units | 35,871 | 150,600 | 3,775,842 |
| Detached houses | 15% | 47% | 53% |
| In buildings of 5 or more | 25% | 23% | 22% |
| Mobile homes | under 1% | under 1% | 1% |
| Built before 1960 | 65% | 41% | 38% |
| Built since 2000 | 8% | 14% | 15% |
| Middle year built | 1950 | 1967 | 1969 |
| Owner-occupied | 36% | 62% | 64% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.
Local help
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.
Radon professionals listed in Trenton: 1 of 1
1 listing with Trenton as the city. See radon mitigation in Trenton, or all radon professionals in New Jersey.
Trenton, Local resources
Local resources for Trenton
Who to ask in New Jersey: its radon program, test kits and professionals.
- Radon SectionRun by New Jersey Department of Environmental Protection, phone 800-648-0394.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 Jersey1 listing covers Trenton.
The program's own words on licensing and disclosure are on the New Jersey page.
What it means
Trenton, Questions
Questions about radon in Trenton
What radon zone is Trenton in?
EPA's map puts Mercer County, and with it Trenton, in Zone 1, the map's highest class: a predicted county average above 4 pCi/L.
What are radon levels in Trenton?
Most tests near Trenton come back under EPA's action level, but not all: 10.6% of Mercer County's 6,370 tests for 2022 were at or above 4 pCi/L. The median reported result was 0.9 pCi/L.
Should I test my home in Trenton?
Yes. In Mercer County, about one reported test in 9 reached 4 pCi/L. That is about what New Jersey as a whole reports (9.7%), and ranks Mercer County 8th of the 21 New Jersey counties with 30 or more tests. The number for one house comes only from testing it. How to test a home.
What ground is Trenton built on, as far as radon goes?
81.7% of Trenton sits on what USGS's map calls "Inner Coastal Plain", rated moderate for radon potential, radon index 10; another 16.4% is "Southern Piedmont", rated high for radon potential, radon index 14. 2 smaller areas make up the rest. So the ground changes within Trenton itself.
Is radon higher in the counties around Trenton?
It depends which way you go. 2 of the 8 nearest counties with a figure report a larger share than Mercer County's 10.6% and 6 a smaller one: from Ocean County (1.8%, 35 miles off) to Hunterdon County (21.1%, 25 miles off).
Who tests for or fixes radon in Trenton?
Trenton is the address of one business in Radon411's directory, listed for mitigation, none for testing. Each entry names the public list it came from. Radon professionals in Trenton.
The answers use the published figures of Mercer County, the county Trenton lies in.
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