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Rhode Island Radon Map and Levels by County

Rhode Island'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

    23.8%

    11.9 pts below U.S.

    Rhode Island
    23.8%
    U.S.
    35.7%

    37,874 tests across 5 counties, 2008 to 2017

  • Rank among states

    32 of 47

    Middle of the states

    Rhode Island
    23.8%
    North Dakota
    59.3%

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

  • Counties in EPA Zone 1

    2 of 5

    Some at highest potential

    Zone 1
    2
    Zone 2
    2

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

  • Highest county

    39.1%

    Washington County

    Washington
    39.1%
    Bristol
    14.8%

    Counties with 30+ tests, 2008 to 2017

Read a result for Rhode Island

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. 23.8% of Rhode Island's reported tests reached 4 pCi/L, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Rhode Island, At a glance

Rhode Island at a glance

Predicted: EPA radon zone

5 of 5 counties classified

EPA classifies counties, not states. Of the 5 counties in Rhode Island with a zone, 2 are in Zone 1, 2 in Zone 2 and 1 in Zone 3.

  • Zone 1: Highest predicted potentialgreater than 4 pCi/L2 of 5 counties · 40.0%
  • Zone 2: Moderate predicted potential2 to 4 pCi/L2 of 5 counties · 40.0%
  • Zone 3: Lower predicted potentialless than 2 pCi/L1 of 5 counties · 20.0%

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 Rhode Island's radon test figures by county: 5 of its 5 counties have one. Each one's share is in the county list.

How to read these figures

Rhode Island, Compared

Rhode Island radon figures, compared

Calculated by Radon411
Rhode Island, 2008 to 2017, laboratory
23.8%
of 37,874 tests at or above 4 pCi/L, pooled
Against the U.S.
−11.9points
35.7% pooled
Rank among the states
32 of 47
1 is the highest share
Counties with 30 or more tests
5
Highest
39.1%
Washington County
Lowest
14.8%
Bristol County

About 2 in 10 of the 37,874 tests reported for Rhode Island over the 2008 to 2017 laboratory totals came back at or above 4 pCi/L (23.8%, 5 counties pooled). That is 32nd of 47 states with county figures for the period; Massachusetts (23.8%) above it and Arkansas (23.2%) below.

By band, 1 county at 30% to 50%, 3 counties at 15% to 30%, 1 county at 5% to 15%. Its 5 counties with 30 or more tests run from 14.8% in Bristol County to 39.1% in Washington County; in 0 of them half or more of the reported tests reached 4 pCi/L.

EPA's 1993 map puts 2 of its 5 classified counties in Zone 1; against that, 23.8% of the tests reported since reached 4 pCi/L. The national pool for the same period is 35.7%, so Rhode Island runs 11.9 points below the country.

Across its 4 overlapping ten-year totals, the share went from 23.0% (2005 to 2014) to 23.8% (2008 to 2017), within 2 points, with 2008 to 2017 the highest at 23.8%.

Rhode Island 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
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%
Florida35 of 476253,79422.7%
North Carolina36 of 479973,13922.6%
Alabama37 of 476512,56921.9%
Rhode Island's highest counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/L
Washington County1 of 57,90339.1%
Kent County2 of 57,65726.1%
Newport County3 of 52,79224.4%
Providence County4 of 517,65516.8%
Bristol County5 of 51,86714.8%
Rhode Island'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 more00None
30% to 50%17,903Washington County
15% to 30%328,104Kent County, Newport County, Providence County
5% to 15%11,867Bristol County
Under 5%00None
Rhode Island ten-year laboratory totals, pooled, against the United States
PeriodCountiesTestsAt or above 4 pCi/LUnited StatesChange from the row before
2008 to 2017537,87423.8%35.7%+0.3 points
2007 to 2016536,35723.5%35.8%−0.2 points
2006 to 2015533,56223.7%36.3%+0.7 points
2005 to 2014532,42723.0%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.

Rhode Island, Counties

Rhode Island counties by EPA zone

Predicted

Rhode Island's radon map, then all 5 counties by EPA's zone, the highest reported share of tests at or above 4 pCi/L first; each has its own report.

Rhode Island radon map by county: EPA radon zones. Map of Rhode Island's 5 counties shaded by EPA radon zone: Zone 1 in red-orange, Zone 2 in amber, Zone 3 in pale sand. 2 in Zone 1, 2 in Zone 2, 1 in Zone 3.
Rhode Island radon map by countyEPA radon zones for Rhode Island's counties: 2 counties in Zone 1, 2 counties in Zone 2, 1 county in Zone 3.A prediction for each county, not a reading of any home; elevated homes occur in all three zones.

The 5 highest in Rhode Island, 2008 to 2017

Local help

Rhode Island, Local resources

Local resources in Rhode Island

Who to ask in Rhode Island: its radon program, test kits and professionals.

What Rhode Island's program says
Licensing of radon professionals
This page lists Radon Testing businesses that are licensed by the Rhode Island Department of Health.

What it means

Rhode Island, Questions

Questions about radon in Rhode Island

Is radon a problem in Rhode Island?

EPA's Map of Radon Zones places 2 of the 5 Rhode Island counties it classifies in Zone 1, the highest predicted potential, 2 in Zone 2 and 1 in Zone 3. Pooled from 5 counties, 23.8% of the 37,874 radon tests reported to CDC over the 2008 to 2017 laboratory totals were at or above 4 pCi/L, 32nd of 47 states.

Who does radon mitigation in Rhode Island?

Radon411's Rhode Island directory lists 36 radon businesses for testing, mitigation or both, each with the licensing list it was read from.

Which Rhode Island counties are in EPA radon Zone 1?

2 counties are in Zone 1: Kent County, Washington County.

Which Rhode Island counties have the highest radon?

By the share of reported tests at or above 4 pCi/L, 2008 to 2017, laboratory: Washington County 39.1% (7,903 tests), Kent County 26.1% (7,657 tests), Newport County 24.4% (2,792 tests), Providence County 16.8% (17,655 tests), Bristol County 14.8% (1,867 tests).

Which EPA region is Rhode Island in?

Rhode Island is in EPA Region 1: New England.

Products

Rhode Island, Products

Testing a home in Rhode Island

23.8% of the 37,874 tests reported to CDC for Rhode Island 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 Rhode Island; a long-term test tells the year-round average.

Test kits and monitors3

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Best radon monitors for Rhode Island homes, compared

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