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Radon Levels in Windham County, Vermont

EPA puts Windham County in Zone 2, its middle radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

Predicted
Zone 2Moderate predicted potential
Measured
21.7%of 60 tests reported to CDC (2023) were at or above 4 pCi/L
Your home
Test to knowNo area figure here is a reading of your home.
How to test this homeFind a certified tester

The data

Windham County, At a glance

Windham County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

This is a county-level geologic prediction. It is not a measurement of any address, and houses with elevated radon are found in all three zones.

What EPA predicts hereScreening level, geology

EPA predicts an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³) across the county as a whole.

USGS geologic potential: Moderate across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Windham County, 2023

Tests reported
60
At or above 4 pCi/L
21.7%
Median result
2.2 pCi/L
Reported results by concentration band, Windham County, 2023
Under 2 pCi/L: 48%2 to 4 pCi/L: 30%4 pCi/L and above: 22%

Of 60 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Windham County, 2023: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L2948.3%
2 to 4 pCi/L1830.0%
4 pCi/L and above1321.7%

CDC publishes this figure only for counties here, so there is no state or national number to compare Windham County, Vermont with.

What these figures count

Distribution of radon tests reported to CDC, not this house. People testing before a sale, or because they suspect a problem, are over-represented in any reported testing data.

The figures at the top are for 2023: a percentage there is a share of radon tests reported to CDC for Windham County in 2023, and a percentage in a view below is a share of the tests reported for the year or period it names. It is not a share of homes in Windham County, and it is not a random sample: it counts only the tests people chose to run and that were reported.

CDC works out the shares and the median over pre-mitigation tests, counting a test not marked as before or after mitigation as one of them (60 for 2023). The median is the middle result of those tests, not of buildings. CDC also reports the number of buildings tested (54), a different count, so the two totals are not interchangeable.

Windham County's own published CDC figures beside those of the counties that border it, for the same period.

Each figure is that county’s own published CDC figure for 2023, counting radon tests reported to CDC, not homes. Windham County is this page. Nothing is averaged or combined across counties. The test count beside each county is CDC’s published number of pre-mitigation tests behind its figures. Figures from few tests can swing widely from year to year. No published CDC figure for 2023: Cheshire County, NH; Franklin County, MA; Sullivan County, NH. Every Vermont county’s own figure is in the Vermont county table.

Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).

Radon Action Brief

National Radon Action MonthPre-sale

Windham County's radon brief, in one dated file.

  • Your area's radon record, explained.
  • Your plan to test this week.
  • Fix costs and pros near you.

Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25

Get the Windham County BriefSee a free sample

Area data, not a test of the building.

Local help

Windham County, Local resources

Radon testing and mitigation in Windham County

Who tests and fixes radon in Windham County: listed businesses, Vermont's radon program and test kits.

What Vermont's program says
Phone
802-863-7220

What it means

Windham County, Questions

Questions about radon in Windham County

Common questions

8 questions, answered from the figures above

Are radon levels high in Windham County?

In 2023, 21.7% of the radon tests reported to CDC for Windham County, Vermont were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.2 pCi/L. That is a share of reported tests, not of homes. EPA places Windham County in Zone 2, moderate predicted potential, a predicted average indoor screening level 2 to 4 pCi/L. Homes with elevated levels occur in all three zones, so the figures describe the area, not your house. Testing is the only way to know the radon level in a specific building.

Radon levels: what a result meansWhat is radon?Radon levels in Vermont

How do I get a radon test in Windham County?

EPA says you can test your home yourself or hire a qualified radon test company, and that either approach takes only a small amount of time and effort. No radon testing business listed on Radon411 has an address in Windham County or names it as a service area yet. The Vermont radon program is the place to ask about certified testers and any test kit offer it runs.

Radon testing: how to test a homeRadon test kits comparedFree and low-cost kits by stateRadon Action Month checklistVermont radon program

Who does radon mitigation in Windham County?

Radon411 has no radon business listed for Vermont yet. EPA recommends having a qualified contractor fix a home with a radon problem, because lowering high radon levels takes technical knowledge and special skills, and some states require the work to be done by a licensed or certified professional. Your state radon program is the place to check whether Vermont requires one.

Radon mitigation: how it worksRadon mitigation costRadon mitigation systemsVermont radon program

What EPA radon zone is Windham County in?

EPA places Windham County, Vermont in Zone 2, which EPA describes as moderate predicted potential for the area. A zone is a prediction for the whole county and never determines whether a particular home should be tested. EPA recommends testing every home regardless of zone.

Should I test my home in Windham County?

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.

When is the best time of year to test?

EPA says short-term tests stay in the home from 2 to 90 days and that all radon tests should run a minimum of 48 hours; long-term tests stay more than 90 days. EPA's guides do not name a best season: they say radon levels tend to vary from day to day and season to season, so a long-term test is more likely than a short-term test to tell you the year-round average.

What does it cost to test?

EPA's Citizen's Guide calls testing easy and inexpensive, and EPA's Home Buyer's and Seller's Guide says passive short-term and long-term devices are generally inexpensive, while active devices may cost more. No national average price is published for this, so Radon411 does not give one. What testing costs.

Which counties border Windham County?

Windham County borders 5 counties, derived from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county's report can be relevant.

If you own, buy, sell or rent

What these figures mean for each reader, with the guide that covers it

The reported-test figures on this page describe Windham County, Vermont in 2023. They describe tests other people carried out in other buildings, and none of them measures yours.

Windham County in figures

The figures above, said in words

What the published data says about Windham County, in words. A zone and a share of tests describe an area, never the level in any one home.

    • Predicted

      Predicted

      EPA places Windham County in Zone 2, moderate predicted potential, as it does 11 other counties of Vermont's 14.

      Of the 5 bordering counties, EPA places Bennington County, Cheshire County, NH, Franklin County, MA, Sullivan County, NH and Windsor County in Zone 2.

  • Reported tests

    Measured

    CDC has annual figures for Windham County for 10 years, 2014 to 2023. In 2023, 21.7% of 60 reported tests were at or above 4 pCi/L.

    Across those years the share ranged from 6.7% (2015) to 21.7% (2023). Few tests in a year can move it a long way.

  • Local record

    Vermont's radon program is the Radon Program, run by Vermont Department of Health; its contacts are under Local resources.

    The county's largest incorporated places are Bellows Falls, Saxtons River and Westminster; the figures here cover them as part of the county.

Products

Windham County, Products

Testing and mitigation products

Whatever the figures for Windham County show, only a test tells you about one home.

Test kits and monitors42

See all products

As an Amazon Associate, Radon411 earns from qualifying purchases.

Best radon monitors for Windham County homes, compared

Testing

5

Mitigation

3

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Windham County, Bordering counties

Counties bordering Windham County

Calculated by Radon411
Why bordering counties matter

5 counties share a boundary with Windham County, computed from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county’s report can be worth reading alongside this one.

Windham County, Cities and towns

Cities and towns in Windham County

The radon figures on this page are for Windham County as a whole. They do not differ by city or town.

  • Bellows Falls
  • Saxtons River
  • Westminster
  • Jacksonville
  • Newfane

5 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files.

Windham County, Next steps

What to do next

  1. LearnKnow what radon isWhat radon is, how it gets indoors, and why a county zone is not a reading for your home.Learn about radon
  2. TestTest the building you live inShort-term or long-term, where the device goes, and closed-house conditions.How to test
  3. FixBring a high level downHow a mitigation system works, and the retest that confirms it.How mitigation works
  4. Find a proHire a certified professionalMeasurement and mitigation professionals by state, with their certifications.Find a professional

Informational. Follow EPA guidance. EPA says all radon tests should be taken for a minimum of 48 hours, with windows and doors closed from 12 hours before a short-term test.