Does radon mitigation work?

Yes. Properly installed systems typically reduce radon levels significantly. Post-mitigation testing confirms performance.

Radon Levels, Testing and Mitigation in Vermont

Q: What radon level is considered high?

The EPA action level is 4.0 pCi/L. Many homeowners also choose to fix levels between 2.0 and 4.0 pCi/L.

Q: How much does radon mitigation cost in Vermont?

Radon mitigation typically costs between $800 and $2,500 depending on foundation type and severity.

Vermont has 14 counties, with 0 classified as EPA Zone 1 (highest risk). With an average radon level of 7.63 pCi/L, Vermont state testing data reveals significantly elevated risks across multiple counties. Testing is highly recommended.

Vermont is the 6th most expansive state in terms of size and the 2nd least populous.

Vermont does have an active radon program, dedicated to educating citizens about the risks associated with the deadly gas. You can find more information on Radon, testing and mitigation at the official page.

7.63

Avg. pCi/L

Counties

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Zone 1 Counties

Vermont Radon Map

Zone 1 — High

Zone 2 — Moderate

Zone 3 — Low

Vermont Metro Areas

Explore radon data organized by metro region, including average levels, hotspot cities, and local mitigation professionals.

Burlington Metro

5 cities

Most Active Radon Markets in Vermont

Cities with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
Stowe	13.00 pCi/L	2
Wilmington	8.50 pCi/L	2

Vermont Counties by EPA Radon Zone

All 14 Vermont counties with their EPA radon zone classification and user-submitted average radon levels.

Zone 2 — Moderate Risk

Predicted avg. indoor levels 2–4 pCi/L

Zone 2 12 counties

Addison County Zone 2

Avg: 7.0 pCi/L

Bennington County Zone 2

Avg: 9.0 pCi/L

Caledonia County Zone 2

Avg: 8.0 pCi/L

Essex County Zone 2

Avg: —

Franklin County Zone 2

Avg: —

Lamoille County Zone 2

Avg: 10.0 pCi/L

Orange County Zone 2

Avg: 7.4 pCi/L

Orleans County Zone 2

Avg: 5.5 pCi/L

Rutland County Zone 2

Avg: 5.8 pCi/L

Washington County Zone 2

Avg: 6.8 pCi/L

Windham County Zone 2

Avg: 6.9 pCi/L

Windsor County Zone 2

Avg: 7.0 pCi/L

Zone 3 — Low Risk

Predicted avg. indoor levels < 2 pCi/L

Zone 3 2 counties

Chittenden County Zone 3

Avg: 11.1 pCi/L

Grand Isle County Zone 3

Avg: 5.7 pCi/L

Vermont Cities & Towns

Browse radon data for individual cities across Vermont. Each city page includes user-submitted radon levels, local contractors, and mitigation resources.

Adamant Albany Alburgh Arlington Bakersfield Barnet Barre Barton Beecher Falls Bellows Falls Belmont Belvidere Center Bennington Bethel Bomoseen Bondville Bradford Brandon Brattleboro Bridgewater Bridgewater Corners Bridport Bristol Brookfield Brownsville Burlington Cabot Calais Cambridge Cambridgeport Canaan Castleton Cavendish Center Rutland Charlotte Chelsea Chester Chittenden Colchester Concord Corinth Craftsbury Craftsbury Common Cuttingsville Danby Danville Derby Derby Line Dorset East Arlington East Barre East Berkshire East Burke East Calais East Charleston East Corinth East Dorset East Dover East Fairfield East Hardwick East Haven East Montpelier East Randolph East Ryegate East Thetford East Wallingford Eden Eden Mills Enosburg Falls Essex Junction Fair Haven Fairfax Fairfield Fairlee Ferrisburgh Florence Franklin Gilman Glover Grafton Grand Isle Graniteville Granville Greensboro Greensboro Bend Groton Guildhall Hancock Hardwick Hartland Highgate Center Hinesburg Huntington Hyde Park Irasburg Island Pond Isle La Motte Jacksonville Jamaica Jeffersonville Jericho Johnson Killington Londonderry Lowell Ludlow Lunenburg Lyndon Center Lyndonville Manchester Center Marshfield Middlebury Middletown Springs Milton Montgomery Center Montpelier Moretown Morgan Morrisville Mount Holly New Haven Newbury Newfane Newport Newport Center North Bennington North Clarendon North Concord North Ferrisburgh North Hartland North Hero North Montpelier North Pomfret North Pownal North Springfield North Troy Northfield Norton Norwich Orleans Orwell Pawlet Peacham Perkinsville Peru Pittsfield Pittsford Plainfield Plymouth Post Mills Poultney Pownal Proctor Proctorsville Putney Quechee Randolph Randolph Center Reading Readsboro Richford Richmond Ripton Rochester Roxbury Rutland Saint Albans Saint Johnsbury Salisbury Saxtons River Shaftsbury Sharon Sheffield Shelburne Sheldon Shoreham South Burlington South Hero South Londonderry South Newfane South Pomfret South Royalton South Ryegate South Strafford South Woodstock Springfield Stamford Starksboro Stockbridge Stowe Strafford Sutton Swanton Taftsville Thetford Center Topsham Townshend Troy Tunbridge Underhill Vergennes Vernon Vershire Waitsfield Wallingford Wardsboro Warren Washington Waterbury Waterbury Center Waterville Wells Wells River West Burke West Charleston West Danville West Dover West Fairlee West Glover West Halifax West Hartford West Pawlet West Rupert West Rutland West Topsham West Townshend West Wardsboro Westfield Westford Westminster Weston White River Junction Whiting Whitingham Williamstown Williamsville Williston Wilmington Windsor Winooski Wolcott Woodbury Woodstock Worcester

Frequently Asked Questions About Radon in Vermont

What radon level is considered "high"?

The EPA action level is 4.0 pCi/L — many homeowners also choose to fix levels between 2.0 and 4.0 pCi/L. Any home with levels at or above 4.0 pCi/L should be mitigated.

How much does radon mitigation cost in Vermont?

Radon mitigation typically costs between $800 and $2,500, depending on foundation type and radon severity. A standard sub-slab depressurization system usually falls in the $1,000–$1,500 range.

Does mitigation actually work?

Yes — properly installed systems typically reduce radon levels by up to 99%. A post-mitigation test confirms the system is working correctly, and many homeowners re-test periodically.

Should I test again after mitigation?

Yes. A post-mitigation test is the proof your system is working. The EPA recommends testing within 30 days of installation and retesting every two years.

What EPA Radon Zone is my Vermont county in?

Vermont counties are classified into three EPA Radon Zones. Zone 1 (highest risk, >4 pCi/L) indicates the most concern. Zone 2 (moderate, 2–4 pCi/L) and Zone 3 (lowest, <2 pCi/L) round out the classification. Use the county directory above to find your specific county's zone and data.