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New York Radon Map and Levels by County

New York's counties span all three EPA radon zones. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    24.5%

    11.2 pts below U.S.

    New York
    24.5%
    U.S.
    35.7%

    97,145 tests across 62 counties, 2008 to 2017

  • Rank among states

    29 of 47

    Middle of the states

    New York
    24.5%
    North Dakota
    59.3%

    By share, every state pooled the same way, 2008 to 2017

  • Counties in EPA Zone 1

    34 of 62

    Most at highest potential

    Zone 1
    34
    Zone 2
    13

    Most counties sit in Zone 1; Zone 1 is the highest potential

  • Highest county

    52.3%

    Chemung County

    Chemung
    52.3%
    Bronx
    3.2%

    Counties with 30+ tests, 2008 to 2017

Read a result for New York

Starts at EPA's action level

4.0pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 4.0 pCi/L

At or above 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. 24.5% of New York's reported tests reached 4 pCi/L, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

New York, At a glance

New York at a glance

Predicted: EPA radon zone

62 of 62 counties classified

EPA classifies counties, not states. Of the 62 counties in New York with a zone, 34 are in Zone 1, 13 in Zone 2 and 15 in Zone 3.

  • Zone 1: Highest predicted potentialgreater than 4 pCi/L34 of 62 counties · 54.8%
  • Zone 2: Moderate predicted potential2 to 4 pCi/L13 of 62 counties · 21.0%
  • Zone 3: Lower predicted potentialless than 2 pCi/L15 of 62 counties · 24.2%

An EPA radon zone predicts a whole county. It is not intended to determine whether any individual home should be tested: homes with elevated levels occur in all three zones, and EPA recommends testing every home regardless of zone.

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

CDC test figures, county by county

CDC publishes New York's radon test figures by county: 62 of its 62 counties have one. Each one's share is in the county list.

How to read these figures

New York, Compared

New York radon figures, compared

Calculated by Radon411
New York, 2008 to 2017, laboratory
24.5%
of 97,145 tests at or above 4 pCi/L, pooled
Against the U.S.
−11.2points
35.7% pooled
Rank among the states
29 of 47
1 is the highest share
Counties with 30 or more tests
61
Highest
52.3%
Chemung County
Lowest
3.2%
Bronx County

About 2 in 10 of the 97,145 tests reported for New York over the 2008 to 2017 laboratory totals came back at or above 4 pCi/L (24.5%, 62 counties pooled). That is 29th of 47 states with county figures for the period; Georgia (24.8%) above it and Maryland (23.9%) below.

By band, 2 counties at 50% or more, 19 counties at 30% to 50%, 26 counties at 15% to 30%, 13 counties at 5% to 15%, 1 county at under 5%. Its 61 counties with 30 or more tests run from 3.2% in Bronx County to 52.3% in Chemung County; in 2 of them half or more of the reported tests reached 4 pCi/L.

EPA's 1993 map puts 34 of its 62 classified counties in Zone 1; against that, 24.5% of the tests reported since reached 4 pCi/L. The national pool for the same period is 35.7%, so New York runs 11.2 points below the country.

Across its 4 overlapping ten-year totals, the share went from 25.2% (2005 to 2014) to 24.5% (2008 to 2017), within 2 points, with 2005 to 2014 the highest at 25.2%.

New York ranked among 47 states by pooled share of tests at or above 4 pCi/L, 2008 to 2017, laboratory
StateRankCountiesTestsAt or above 4 pCi/L
Michigan24 of 4783114,40726.9%
Connecticut25 of 47825,57226.5%
Washington26 of 47398,20125.5%
Oregon27 of 473423,95125.4%
Georgia28 of 4712930,15224.8%
New York29 of 476297,14524.5%
Maryland30 of 472447,94123.9%
Massachusetts31 of 4714234,15223.8%
Rhode Island32 of 47537,87423.8%
Arkansas33 of 475866823.2%
Nevada34 of 471610,93022.8%
New York's highest and lowest counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/L
Chemung County1 of 611,53752.3%
Cortland County2 of 6178851.0%
Yates County3 of 6113545.9%
Steuben County4 of 611,08045.3%
Allegany County5 of 6138342.6%
Herkimer County6 of 6133741.5%
Dutchess County7 of 612,13340.8%
Cattaraugus County8 of 6159940.6%
Columbia County9 of 6157339.8%
Wyoming County10 of 6133839.3%
Bronx County61 of 611853.2%
Nassau County60 of 616315.2%
Queens County59 of 614195.3%
New York County58 of 617597.1%
Suffolk County57 of 615518.0%
New York's counties with 30 or more tests, by their own share at or above 4 pCi/L, 2008 to 2017, laboratory
ShareCountiesTheir testsFor example
50% or more22,325Chemung County, Cortland County
30% to 50%1918,744Yates County, Steuben County, Allegany County
15% to 30%2668,728Ulster County, Rensselaer County, Onondaga County
5% to 15%137,152Montgomery County, Rockland County, Niagara County
Under 5%1185Bronx County
New York ten-year laboratory totals, pooled, against the United States
PeriodCountiesTestsAt or above 4 pCi/LUnited StatesChange from the row before
2008 to 20176297,14524.5%35.7%−0.4 points
2007 to 20166292,76124.9%35.8%−0.3 points
2006 to 20156285,13525.2%36.3%Level
2005 to 20146276,23125.2%36.0%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period. CDC publishes no state or national figure.

New York, State data

New York's own radon test data

Measured

What New York's own agencies publish about radon tests, with their publisher and 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 New York

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

30.5%

Average result

5.1 pCi/L

Tests behind these figures

2,585.8 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.

New York, Counties

New York counties by EPA zone

Predicted

The map of New York, then its 62 counties zone by zone, each with its reported share at or above 4 pCi/L and a report of its own.

New York radon map by county: EPA radon zones. Map of New York's 62 counties shaded by EPA radon zone: Zone 1 in red-orange, Zone 2 in amber, Zone 3 in pale sand. 34 in Zone 1, 13 in Zone 2, 15 in Zone 3.
New York radon map by countyEPA radon zones for New York's counties: 34 counties in Zone 1, 13 counties in Zone 2, 15 counties in Zone 3.A prediction for each county, not a reading of any home; elevated homes occur in all three zones.

The 12 highest in New York, 2008 to 2017

Zone 1: highest predicted potential34

Local help

New York, Local resources

Local resources in New York

Who to ask in New York: its radon program, test kits and professionals.

What New York's program says
Phone
518-402-7556
Email
radon@health.ny.gov
Licensing of radon professionals
NYS does not certify or license radon testers.

What it means

New York, Questions

Questions about radon in New York

Is radon a problem in New York?

New York has 62 counties on EPA's Map of Radon Zones: Zone 1, the highest predicted potential, for 34; Zone 2 for 13; Zone 3 for 15. Pooled from 62 counties, 24.5% of the 97,145 radon tests reported to CDC over the 2008 to 2017 laboratory totals were at or above 4 pCi/L, 29th of 47 states.

Who does radon mitigation in New York?

Radon411's New York directory lists 88 radon businesses for testing, mitigation or both, each with the licensing list it was read from.

Which New York counties are in EPA radon Zone 1?

34 counties are in Zone 1: Albany County, Allegany County, Broome County, Cattaraugus County, Cayuga County, Chautauqua County, Chemung County, Chenango County, and 26 more in the county table on this page.

Which New York counties have the highest radon?

By the share of reported tests at or above 4 pCi/L, 2008 to 2017, laboratory: Chemung County 52.3% (1,537 tests), Cortland County 51.0% (788 tests), Yates County 45.9% (135 tests), Steuben County 45.3% (1,080 tests), Allegany County 42.6% (383 tests).

Which EPA region is New York in?

New York is in EPA Region 2: New Jersey, New York, Puerto Rico, U.S. Virgin Islands.

Products

New York, Products

Testing a home in New York

24.5% of the 97,145 tests reported to CDC for New York over the 2008 to 2017 laboratory totals reached 4 pCi/L: a short-term kit (2 to 90 days) gives a first answer in days, a long-term test the year-round average. A short-term kit (2 to 90 days) is the quick first check for a home in New York; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for New York homes, compared

Explore

Cities in New York with their own page

Radon data is published by county, not by city. Each city page sets the figures of the counties the city lies in side by side.