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 Richmond County, New York
EPA puts Richmond County in Zone 3, its lowest radon zone, and only 1 radon test from it is on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
11.2%
14.0 pts below NY
- Richmond
- 11.2%
- New York
- 25.2%
329 tests, 2006 to 2015
Median result
0.9pCi/L
Below action level
- Richmond
- 0.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2006 to 2015
Tests reported
329
44th of 61 by tests
- Richmond
- 329
- Erie
- 11,939
Reported to CDC before any fix, 2006 to 2015
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in New York
53 of 61
Lowest quarter
- Richmond
- 11.2%
- Chemung
- 52.6%
By share, of 61 with 30+ tests
Read a result for Richmond County
Starts at Richmond 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. Richmond County's median reported result, 2006 to 2015.
The data
Richmond County, At a glance
Richmond County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 92% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Richmond County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2015 | 0.0% |
| 2017 | 0.0% |
| 2018 | 0.0% |
| 2019 | 0.0% |
| 2020 | 0.0% |
| 2023 | 0.0% |
2023: 0.0%. Across these years the share ran from 0.0% to 0.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 1 test was reported to CDC for Richmond County over 2023, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Richmond County, Compared
Richmond County radon figures, compared
Calculated by Radon411Richmond County reports fewer high tests than New York overall. 11.2% of its 329 tests over the 2006 to 2015 laboratory totals were at or above 4 pCi/L. That is 14.0 points below the 25.2% pooled from 62 New York counties.
The newest figure, in 2023, counts only 1 test (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 329-test figure.
Ordered from highest share down, it comes 53rd of 61 New York counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 36.3%; Richmond County sits 25.1 points below it.
Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 11.2% share point the same way here.
Half the tests came in under 0.9 pCi/L and half over it; the single highest reached 16.7 pCi/L. The rest split 71.7% under 2 pCi/L and 17.0% from 2 to 4 (New York: 51.5% and 23.3%).
The busiest year on file was 2014, with 4 tests reported; the quietest, 2023, had 1.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Richmond County, State data
New York's own radon test data
MeasuredWhat New York's own agencies publish about radon tests in Richmond County, with their period. These are not CDC's figures and are never added to them.
MeasuredState figures, not CDC's
What the New York State Department of Health reports for Richmond County
Indoor air radon testing data (Environmental Public Health Tracker): short-term charcoal canister tests requested through the NYSDOH Radon Program, presented as five-year rolling averages. Period: 2015-2019. The publisher also lists 15 earlier periods.
Share at or above 4 pCi/L
0%
Average result
1.0 pCi/L
Tests behind these figures
1.4 tests a year on average
- Every figure is a five-year rolling average: the average result is the rolling average of each year's mean, and the test count is an average per year.
- The data only include tests requested through the NYSDOH Radon Program, and therefore may not capture all radon tests performed in a county.
- The data include both screening tests and post-mitigation tests, as it is not always possible to tell them apart.
- Radon testing by homeowners is optional in New York, so the values may not be representative of every home in the county.
- These figures describe tests reported to the New York State Department of Health in this area. They count a different set of tests than CDC's figures and are not a reading of any one home.
Measured: New York State Department of Health data, 2015-2019.
Richmond County, Geology
The ground under Richmond County
PredictedMost of the ground under Richmond County is one class on USGS's geologic map: 92.4% of its land is low radon potential, with 0.2% moderate. 92.4% of it lies in the area the map calls Atlantic Coastal Plain, to which USGS gives a radon index of 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Atlantic Coastal Plain | Glacial deposits and marine sediments. | Low | 7 | 92.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Richmond County beside the ground around it
Across New York 48.9% of the land is rated high; none of Richmond County's is. Of the 3 counties that border it, 2 have more high-potential ground, Middlesex County, NJ the most at 26.1%.
The map rates the ground, not the air in any home.
Local help
Richmond County, Local resources
Radon testing and mitigation in Richmond County
- Radon ProgramRadon Program, run by New York State Department of Health, does not license radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in New York.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Providing patients with information about how low-cost test kits may be obtained from the Radon Program.
- Compare kits
- Professionals in New York88 professionals are listed in New York.
Listed radon professionals by town: New York
What New York's program says
- Phone
- 518-402-7556
- radon@health.ny.gov
- Licensing of radon professionals
NYS does not certify or license radon testers.
What it means
Richmond County, Questions
Questions about radon in Richmond County
Are radon levels high in Richmond County?
In 2023, 0.0% of the radon tests reported to CDC for Richmond County, New York were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Of 61 New York counties with 30 or more tests for the same period, 52 reported a higher share; pooled, the state comes to 25.2%.
Which counties border Richmond County?
Richmond County borders 3 counties: Union County, NJ, Hudson County, NJ and Middlesex County, NJ.
Products
Richmond County, Products
Testing a home in Richmond County
In Richmond County, 11.2% of 329 tests reported to CDC over the 2006 to 2015 laboratory totals reached 4 pCi/L, against 25.2% pooled across New York. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Richmond County.
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
MonitorAranet
Radon Plus battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Approved
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Richmond County, Bordering counties
Counties bordering Richmond County
Calculated by Radon411counties bordering Richmond County: 1 of 3
Richmond County, Cities and towns
Cities and towns in Richmond County
The Census Bureau estimates 501,290 residents in Richmond County for July 1, 2025, 6,168 more than in 2020 (+1.2%). Packed into its land, that is 8,715 people per square mile. New York, the largest place on its list (8,584,629 residents in all), extends beyond Richmond County, so no share of the total is worked out for it. Reported testing is thin here: 329 tests over 2006 to 2015, or 0.7 for every 1,000 residents (2025 estimate), where New York as a whole comes to 4.3.
New York is the one incorporated place here; CDC publishes no figure by town, so it reads Richmond County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| New Yorkextends beyond Richmond County | 8,584,629 | −1.9% | Counted whole |
One incorporated place, 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). A place that extends beyond Richmond County is counted whole, so it has no share.
Richmond County, Homes
Homes in Richmond County
Fewer than six in ten of Richmond County's 184,074 homes are detached houses (34%, against 41% across New York); the rest are attached, in shared buildings or mobile. Much of Richmond County is recent building: 14% of its homes have gone up since 2000 and the middle year built is 1974, against 1958 for New York. 68% of occupied homes are lived in by their owner (New York: 54%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Richmond County | New York |
|---|---|---|
| Housing units | 184,074 | 8,539,536 |
| Detached houses | 34% | 41% |
| In buildings of 5 or more | 13% | 34% |
| Mobile homes | under 1% | 2% |
| Built before 1960 | 31% | 53% |
| Built since 2000 | 14% | 12% |
| Middle year built | 1974 | 1958 |
| Owner-occupied | 68% | 54% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.