Oregon Cities Ranked by Indoor Radon Levels
Measured averages from Airthings devices across Oregon, USA. Action level: 4 pCi/L — the threshold at which remediation is recommended.
Drain has the highest measured indoor radon in Oregon at 5.7 pCi/L, based on Airthings measurements across 71 cities.
Updated August 16, 2026
Highest city
5.7pCi/L
Drain
Oregon city average
1.7pCi/L
across 71 cities
Above action level
1/ 71
cities
| # | Location | Avg level | Monitors | vs action level |
|---|---|---|---|---|
| 1 | Drain | 5.7 pCi/L | 9 | 1.4× over |
| ✓ Below EPA action level (4 pCi/L) | ||||
| 2 | Astoria | 3.7 pCi/L | 16 | 0.9× under |
| 3 | Amity | 3.3 pCi/L | 10 | 0.8× under |
| 4 | Hood River | 2.9 pCi/L | 21 | 0.7× under |
| 5 | Banks | 2.6 pCi/L | 16 | 0.7× under |
| 6 | Sherwood | 2.6 pCi/L | 30 | 0.7× under |
| 7 | Salem | 2.6 pCi/L | 96 | 0.7× under |
| 8 | Sandy | 2.6 pCi/L | 15 | 0.7× under |
| 9 | Beaverton | 2.6 pCi/L | 31 | 0.6× under |
| 10 | Milwaukie | 2.5 pCi/L | 94 | 0.6× under |
| 11 | Lents | 2.4 pCi/L | 253 | 0.6× under |
| 12 | Tigard | 2.2 pCi/L | 20 | 0.6× under |
| 13 | Bend | 2.2 pCi/L | 83 | 0.6× under |
| 14 | Keizer | 2.1 pCi/L | 12 | 0.5× under |
| 15 | Durham | 2.1 pCi/L | 46 | 0.5× under |
| 16 | Molalla | 2.1 pCi/L | 6 | 0.5× under |
| 17 | Yamhill | 2.1 pCi/L | 8 | 0.5× under |
| 18 | Estacada | 2.0 pCi/L | 7 | 0.5× under |
| 19 | West Slope | 2.0 pCi/L | 22 | 0.5× under |
| 20 | Scappoose | 1.9 pCi/L | 8 | 0.5× under |
| 21 | Raleigh Hills | 1.9 pCi/L | 15 | 0.5× under |
| 22 | West Linn | 1.9 pCi/L | 36 | 0.5× under |
| 23 | Silverton | 1.8 pCi/L | 17 | 0.5× under |
| 24 | Portland | 1.8 pCi/L | 569 | 0.5× under |
| 25 | Grants Pass | 1.8 pCi/L | 7 | 0.4× under |
| 26 | Newberg | 1.8 pCi/L | 27 | 0.4× under |
| 27 | Beavercreek | 1.8 pCi/L | 15 | 0.4× under |
| 28 | Fairview | 1.7 pCi/L | 14 | 0.4× under |
| 29 | Happy Valley | 1.7 pCi/L | 34 | 0.4× under |
| 30 | Garden Home-Whitford | 1.7 pCi/L | 42 | 0.4× under |
| 31 | Dallas | 1.7 pCi/L | 7 | 0.4× under |
| 32 | Corvallis | 1.6 pCi/L | 41 | 0.4× under |
| 33 | Lake Oswego | 1.6 pCi/L | 95 | 0.4× under |
| 34 | Medford | 1.6 pCi/L | 6 | 0.4× under |
| 35 | Chenoweth | 1.5 pCi/L | 9 | 0.4× under |
| 36 | West Haven-Sylvan | 1.5 pCi/L | 18 | 0.4× under |
| 37 | Stafford | 1.5 pCi/L | 15 | 0.4× under |
| 38 | Turner | 1.5 pCi/L | 9 | 0.4× under |
| 39 | Oatfield | 1.5 pCi/L | 12 | 0.4× under |
| 40 | West Haven | 1.5 pCi/L | 70 | 0.4× under |
| 41 | Wilsonville | 1.5 pCi/L | 22 | 0.4× under |
| 42 | Gresham | 1.4 pCi/L | 36 | 0.4× under |
| 43 | Hillsboro | 1.4 pCi/L | 29 | 0.4× under |
| 44 | Ashland | 1.4 pCi/L | 13 | 0.4× under |
| 45 | Cedar Hills | 1.4 pCi/L | 8 | 0.4× under |
| 46 | Oregon City | 1.4 pCi/L | 13 | 0.3× under |
| 47 | Eugene | 1.4 pCi/L | 49 | 0.3× under |
| 48 | Bethany | 1.4 pCi/L | 9 | 0.3× under |
| 49 | Dundee | 1.3 pCi/L | 11 | 0.3× under |
| 50 | Damascus | 1.3 pCi/L | 11 | 0.3× under |
| 51 | Forest Grove | 1.3 pCi/L | 12 | 0.3× under |
| 52 | Veneta | 1.3 pCi/L | 6 | 0.3× under |
| 53 | Vernonia | 1.3 pCi/L | 8 | 0.3× under |
| 54 | Rockcreek | 1.3 pCi/L | 16 | 0.3× under |
| 55 | Aloha | 1.2 pCi/L | 62 | 0.3× under |
| 56 | Oak Hills | 1.1 pCi/L | 23 | 0.3× under |
| 57 | Springfield | 1.1 pCi/L | 8 | 0.3× under |
| 58 | Tualatin | 1.1 pCi/L | 16 | 0.3× under |
| 59 | Canby | 1.1 pCi/L | 10 | 0.3× under |
| 60 | Woodburn | 1.0 pCi/L | 7 | 0.3× under |
| 61 | Metzger | 1.0 pCi/L | 17 | 0.2× under |
| 62 | Troutdale | 1.0 pCi/L | 24 | 0.2× under |
| 63 | King City | 1.0 pCi/L | 30 | 0.2× under |
| 64 | Cedar Mill | 0.8 pCi/L | 29 | 0.2× under |
| 65 | McMinnville | 0.8 pCi/L | 16 | 0.2× under |
| 66 | Albany | 0.8 pCi/L | 15 | 0.2× under |
| 67 | Cornelius | 0.7 pCi/L | 7 | 0.2× under |
| 68 | Philomath | 0.7 pCi/L | 8 | 0.2× under |
| 69 | Mount Hood Village | 0.7 pCi/L | 7 | 0.2× under |
| 70 | Sunnyside | 0.7 pCi/L | 7 | 0.2× under |
| 71 | Deschutes River Woods | 0.6 pCi/L | 6 | 0.1× under |