Vermont Cities Ranked by Indoor Radon Levels
Measured averages from Airthings devices across Vermont, USA. Action level: 4 pCi/L — the threshold at which remediation is recommended.
Hardwick has the highest measured indoor radon in Vermont at 8.6 pCi/L, based on Airthings measurements across 49 cities.
Updated October 19, 2026
Highest city
8.6pCi/L
Hardwick
Vermont city average
2.8pCi/L
across 49 cities
Above action level
7/ 49
cities
| # | Location | Avg level | vs action level |
|---|---|---|---|
| 1 | Hardwick | 8.6 pCi/L | 2.1× over |
| 2 | Waterbury | 6.4 pCi/L | 1.6× over |
| 3 | Chester | 5.4 pCi/L | 1.4× over |
| 4 | Brandon | 5.4 pCi/L | 1.4× over |
| 5 | Hyde Park | 5.3 pCi/L | 1.3× over |
| 6 | Morristown | 4.8 pCi/L | 1.2× over |
| 7 | Randolph | 4.4 pCi/L | 1.1× over |
| ✓ Below EPA action level (4 pCi/L) | |||
| 8 | Newport | 3.6 pCi/L | 0.9× under |
| 9 | Northfield | 3.5 pCi/L | 0.9× under |
| 10 | West Rutland | 3.5 pCi/L | 0.9× under |
| 11 | West Brattleboro | 3.4 pCi/L | 0.9× under |
| 12 | North Hero | 3.3 pCi/L | 0.8× under |
| 13 | Woodstock | 3.2 pCi/L | 0.8× under |
| 14 | Bennington | 3.2 pCi/L | 0.8× under |
| 15 | North Bennington | 3.2 pCi/L | 0.8× under |
| 16 | Richford | 3.1 pCi/L | 0.8× under |
| 17 | Bellows Falls | 3.0 pCi/L | 0.7× under |
| 18 | Hinesburg | 2.9 pCi/L | 0.7× under |
| 19 | Milton | 2.9 pCi/L | 0.7× under |
| 20 | Chelsea | 2.8 pCi/L | 0.7× under |
| 21 | Montpelier | 2.7 pCi/L | 0.7× under |
| 22 | Dover | 2.6 pCi/L | 0.7× under |
| 23 | Rockingham | 2.6 pCi/L | 0.7× under |
| 24 | Windsor | 2.6 pCi/L | 0.7× under |
| 25 | Manchester Center | 2.5 pCi/L | 0.6× under |
| 26 | Poultney | 2.5 pCi/L | 0.6× under |
| 27 | Saint Johnsbury | 2.3 pCi/L | 0.6× under |
| 28 | South Barre | 2.3 pCi/L | 0.6× under |
| 29 | Jericho | 2.2 pCi/L | 0.5× under |
| 30 | Swanton | 2.1 pCi/L | 0.5× under |
| 31 | Brattleboro | 2.1 pCi/L | 0.5× under |
| 32 | Williston | 2.1 pCi/L | 0.5× under |
| 33 | Bristol | 2.0 pCi/L | 0.5× under |
| 34 | Lyndonville | 2.0 pCi/L | 0.5× under |
| 35 | Castleton | 1.9 pCi/L | 0.5× under |
| 36 | Johnson | 1.8 pCi/L | 0.5× under |
| 37 | White River Junction | 1.8 pCi/L | 0.5× under |
| 38 | Burlington | 1.8 pCi/L | 0.4× under |
| 39 | Barre | 1.7 pCi/L | 0.4× under |
| 40 | Rutland | 1.6 pCi/L | 0.4× under |
| 41 | Newfane | 1.6 pCi/L | 0.4× under |
| 42 | South Burlington | 1.4 pCi/L | 0.4× under |
| 43 | Winooski | 1.3 pCi/L | 0.3× under |
| 44 | Arlington | 1.3 pCi/L | 0.3× under |
| 45 | Saint Albans | 1.2 pCi/L | 0.3× under |
| 46 | Essex Junction | 1.2 pCi/L | 0.3× under |
| 47 | Vergennes | 1.1 pCi/L | 0.3× under |
| 48 | Morrisville | 1.0 pCi/L | 0.3× under |
| 49 | Middlebury (village) | 0.9 pCi/L | 0.2× under |