| Rank | Air Quality Index ▼ | School District / Population |
| 1. | 44.0 | Frenchglen School District 16 / 122 |
| 2. | 43.9 | Arock School District 81 / 120 |
| 2. | 43.9 | Jordan Valley School District 3 / 469 |
| 4. | 43.5 | Harney County Union High School District 1J / 1,664 |
| 4. | 43.5 | Annex School District 29 / 482 |
| 4. | 43.5 | Vale School District 84 / 4,903 |
| 4. | 43.5 | Adrian School District 61 / 1,195 |
| 4. | 43.5 | Nyssa School District 26 / 5,135 |
| 4. | 43.5 | Ontario School District 8 / 17,865 |
| 10. | 43.5 | South Harney School District 33 / 177 |
| 11. | 43.4 | McDermitt School District 51 / 78 |
| 11. | 43.4 | Diamond School District 7 / 101 |
| 13. | 43.1 | Double O School District 28 / 25 |
| 13. | 43.1 | Joseph School District 6 / 2,072 |
| 15. | 43.0 | Harney County School District 4 / 908 |
| 16. | 42.8 | Harper School District 66 / 324 |
| 16. | 42.8 | Juntura School District 12 / 108 |
| 16. | 42.8 | Huntington School District 16J / 435 |
| 19. | 42.5 | Drewsey School District 13 / 141 |
| 19. | 42.5 | Cove School District 15 / 1,838 |
| 21. | 42.3 | Union School District 5 / 2,266 |
| 21. | 42.3 | Baker School District 5J / 13,694 |
| 23. | 41.7 | North Powder School District 8J / 903 |
| 24. | 41.6 | Pine Creek School District 5 / 83 |
| 25. | 41.5 | Harney County School District 3 / 5,589 |
| 26. | 41.5 | Prairie City School District 4 / 1,259 |
| 27. | 41.4 | Troy School District 54 / 51 |
| 28. | 41.3 | Pine-Eagle School District 61 / 1,473 |
| 29. | 41.1 | Burnt River School District 30J / 395 |
| 29. | 41.1 | Adel School District 21 / 90 |
| 31. | 41.0 | Enterprise School District 21 / 2,891 |
| 32. | 40.9 | Imbler School District 11 / 1,364 |
| 33. | 40.7 | Wallowa School District 12 / 1,879 |
| 34. | 40.5 | Elgin School District 23 / 2,558 |
| 35. | 40.4 | La Grande School District 1 / 16,920 |
| 36. | 40.0 | Suntex School District 10 / 107 |
| 36. | 40.0 | Pilot Rock School District 2 / 2,180 |
| 38. | 39.8 | John Day School District 3 / 4,803 |
| 39. | 39.7 | Pendleton School District 16 / 22,224 |
| 39. | 39.7 | Athena-Weston School District 29J / 2,799 |
| 39. | 39.7 | Milton-Freewater School District 7 / 11,973 |
| 42. | 39.5 | Helix School District 1 / 467 |
| 43. | 39.5 | Long Creek School District 17 / 417 |
| 43. | 39.5 | Glendale School District 77 / 2,665 |
| 43. | 39.5 | Powers School District 31 / 1,040 |
| 43. | 39.5 | Riddle School District 70 / 2,567 |
| 43. | 39.5 | Port Orford-Langlois School District 2J / 3,485 |
| 43. | 39.5 | Ukiah School District 80 / 226 |
| 49. | 39.4 | Klamath Falls City Schools / 23,121 |
| 49. | 39.4 | Morrow School District 1 / 10,586 |
| 51. | 39.3 | Days Creek School District 15 / 1,232 |
| 51. | 39.3 | South Umpqua School District 19 / 12,196 |
| 53. | 39.2 | Klamath County School District / 42,864 |
| 54. | 39.1 | Plush School District 18 / 68 |
| 54. | 39.1 | Ione School District 2 / 639 |
| 54. | 39.1 | Three Rivers School District / 47,349 |
| 54. | 39.1 | Rogue River School District 35 / 9,105 |
| 54. | 39.1 | Central Curry School District 1 / 5,405 |
| 54. | 39.1 | Grants Pass School District 7 / 36,597 |
| 54. | 39.1 | Paisley School District 11 / 531 |
| 54. | 39.1 | Brookings-Harbor School District 17 / 13,720 |
| 62. | 39.0 | Pinehurst School District 94 / 227 |
| 62. | 39.0 | Dayville School District 16J / 410 |
| 64. | 38.9 | Phoenix-Talent School District 4 / 24,791 |
| 64. | 38.9 | Central Point School District 6 / 30,647 |
| 64. | 38.9 | Prospect School District 59 / 1,044 |
| 64. | 38.9 | Ashland School District 5 / 24,494 |
| 64. | 38.9 | Camas Valley School District 21J / 802 |
| 64. | 38.9 | Medford School District 549 / 86,642 |
| 64. | 38.9 | Butte Falls School District 91 / 1,150 |
| 64. | 38.9 | Eagle Point School District 9 / 27,558 |
| 72. | 38.8 | Stanfield School District 61 / 2,700 |
| 72. | 38.8 | Condon School District 25J / 1,120 |
| 74. | 38.7 | Arlington School District 3 / 798 |
| 75. | 38.6 | Fossil School District 21J / 834 |
| 76. | 38.5 | Spray School District 1 / 314 |
| 76. | 38.5 | Monument School District 8 / 436 |
| 78. | 38.3 | Umatilla School District 6 / 5,975 |
| 79. | 38.2 | Hermiston School District 8 / 27,183 |
| 79. | 38.2 | Mitchell School District 55 / 389 |
| 79. | 38.2 | Echo School District 5 / 918 |
| 82. | 38.1 | Sherman School District 1 / 1,790 |
| 83. | 37.7 | Ashwood School District 8 / 135 |
| 84. | 37.5 | Jefferson County School District 509J / 16,035 |
| 85. | 37.4 | Crook County School District / 20,856 |
| 86. | 37.0 | South Wasco County School District 1 / 2,142 |
| 86. | 37.0 | Black Butte School District 41 / 432 |
| 88. | 36.7 | Salem-Keizer School District 24J / 245,673 |
| 88. | 36.7 | Jefferson School District 14J / 6,782 |
| 88. | 36.7 | Cascade School District 5 / 13,792 |
| 88. | 36.7 | Mount Angel School District 91 / 3,894 |
| 88. | 36.7 | Silver Falls School District 4J / 19,876 |
| 88. | 36.7 | Santiam Canyon School District 129J / 4,043 |
| 88. | 36.7 | Scio School District 95 / 4,618 |
| 88. | 36.7 | Gervais School District 1 / 7,697 |
| 88. | 36.7 | Central School District 13J / 21,786 |
| 88. | 36.7 | North Santiam School District 29J / 15,435 |
| 98. | 36.6 | Culver School District 4 / 3,852 |
| 99. | 36.5 | North Lake School District 14 / 1,654 |
| 100. | 36.4 | Coquille School District 8 / 7,196 |
| 100. | 36.4 | Bandon School District 54 / 7,227 |
| 100. | 36.4 | Winston-Dillard School District 116 / 9,676 |
| 100. | 36.4 | Myrtle Point School District 41 / 4,570 |
| 104. | 36.3 | Glide School District 12 / 5,810 |
| 105. | 36.2 | Amity School District 4J / 4,551 |
| 105. | 36.2 | Dallas School District 2 / 20,422 |
| 105. | 36.2 | Bend-La Pine Administrative School District 1 / 110,491 |
| 105. | 36.2 | Sheridan School District 48J / 7,055 |
| 105. | 36.2 | Perrydale School District 21 / 895 |
| 105. | 36.2 | Willamina School District 30J / 5,540 |
| 105. | 36.2 | Falls City School District 57 / 1,216 |
| 112. | 36.0 | Dufur School District 29 / 1,386 |
| 112. | 36.0 | North Wasco School District 21 / 20,723 |
| 114. | 35.9 | Oakridge School District 76 / 4,396 |
| 114. | 35.9 | Coos Bay School District 9 / 26,254 |
| 114. | 35.9 | Oakland School District 1 / 2,675 |
| 114. | 35.9 | Creswell School District 40 / 8,962 |
| 114. | 35.9 | Reedsport School District 105 / 5,507 |
| 114. | 35.9 | North Bend School District 13 / 16,122 |
| 114. | 35.9 | Sutherlin School District 130 / 9,695 |
| 114. | 35.9 | South Lane School District 45J / 18,618 |
| 114. | 35.9 | Yoncalla School District 32 / 2,656 |
| 114. | 35.9 | Roseburg School District 4 / 47,611 |
| 114. | 35.9 | Elkton School District 34 / 1,424 |
| 114. | 35.9 | North Douglas School District 22 / 2,600 |
| 114. | 35.9 | Lowell School District 71 / 2,643 |
| 114. | 35.9 | Pleasant Hill School District 1 / 6,554 |
| 128. | 35.8 | McMinnville School District 40 / 40,061 |
| 128. | 35.8 | Lakeview School District 7 / 5,511 |
| 130. | 35.7 | Hood River County School District 1 / 22,620 |
| 131. | 35.5 | Sisters School District 6 / 8,149 |
| 131. | 35.5 | Redmond School District 2J / 46,775 |
| 133. | 35.4 | Crow-Applegate-Lorane Sd 66 / 2,137 |
| 134. | 35.2 | McKenzie School District 68 / 2,410 |
| 135. | 35.1 | Lebanon Community School District 9 / 28,241 |
| 135. | 35.1 | Philomath School District 17J / 8,464 |
| 135. | 35.1 | Sweet Home School District 55 / 14,797 |
| 135. | 35.1 | Corvallis School District 509J / 65,503 |
| 135. | 35.1 | Central Linn School District 552 / 5,328 |
| 135. | 35.1 | Greater Albany School District 8J / 62,421 |
| 135. | 35.1 | Lincoln County School District / 46,338 |
| 142. | 35.0 | Bethel School District 52 / 38,809 |
| 142. | 35.0 | Mapleton School District 32 / 1,456 |
| 142. | 35.0 | Junction City School District 69 / 12,857 |
| 142. | 35.0 | Eugene School District 4J / 152,154 |
| 142. | 35.0 | Fern Ridge School District 28J / 11,448 |
| 142. | 35.0 | Springfield School District 19 / 74,794 |
| 142. | 35.0 | Siuslaw School District 97J / 14,479 |
| 142. | 35.0 | Harrisburg School District 7J / 5,258 |
| 142. | 35.0 | Blachly School District 090 / 564 |
| 142. | 35.0 | Marcola School District 79J / 2,029 |
| 142. | 35.0 | Monroe School District 1J / 3,460 |
| 153. | 34.7 | Alsea School District 7J / 1,084 |
| 154. | 34.1 | Oregon Trail School District 46 / 28,409 |
| 155. | 33.7 | Estacada School District 108 / 13,620 |
| 156. | 33.5 | North Marion School District 15 / 10,076 |
| 156. | 33.5 | St. Paul School District 45 / 1,404 |
| 156. | 33.5 | Dayton School District 8 / 6,121 |
| 156. | 33.5 | Woodburn School District 103 / 27,277 |
| 160. | 33.4 | Corbett School District 39 / 4,266 |
| 160. | 33.4 | Molalla River School District 35 / 20,532 |
| 160. | 33.4 | Canby School District 86 / 30,466 |
| 163. | 33.3 | Oregon City School District 62 / 54,859 |
| 163. | 33.3 | Colton School District 53 / 4,403 |
| 163. | 33.3 | Nestucca Valley School District 101J / 4,307 |
| 163. | 33.3 | Reynolds School District 7 / 75,406 |
| 167. | 33.2 | Knappa School District 4 / 3,322 |
| 168. | 33.0 | Newberg School District 29J / 34,787 |
| 168. | 33.0 | Yamhill-Carlton School District 1 / 6,678 |
| 168. | 33.0 | Sherwood School District 88J / 30,038 |
| 171. | 32.9 | West Linn School District 3J / 47,012 |
| 172. | 32.8 | Rainier School District 13 / 7,445 |
| 173. | 32.7 | Astoria School District 1 / 13,820 |
| 173. | 32.7 | Warrenton-Hammond School District 30 / 6,193 |
| 173. | 32.7 | Neah-Kah-Nie School District 56 / 7,443 |
| 173. | 32.7 | Scappoose School District 1J / 14,580 |
| 177. | 32.6 | Forest Grove School District 15 / 34,942 |
| 177. | 32.6 | Vernonia School District 47J / 3,709 |
| 177. | 32.6 | Tillamook School District 9 / 13,584 |
| 180. | 32.5 | Gresham-Barlow School District 1J / 76,766 |
| 180. | 32.5 | Clatskanie School District 6J / 5,410 |
| 182. | 32.5 | Seaside School District 10 / 12,214 |
| 182. | 32.5 | Banks School District 13 / 6,489 |
| 184. | 32.4 | Hillsboro School District 1J / 129,769 |
| 184. | 32.4 | Gaston School District 511J / 2,995 |
| 186. | 32.3 | Beaverton School District 48J / 264,366 |
| 186. | 32.3 | Gladstone School District 115 / 11,556 |
| 186. | 32.3 | Tigard-Tualatin School District 23J / 79,788 |
| 186. | 32.3 | North Clackamas School District 12 / 116,845 |
| 186. | 32.3 | St. Helens School District 502 / 20,169 |
| 186. | 32.3 | David Douglas School District 40 / 66,173 |
| 186. | 32.3 | Lake Oswego School District 7J / 40,866 |
| 186. | 32.3 | Portland School District 1J / 475,838 |
| 186. | 32.3 | Riverdale School District 51J / 2,683 |
| 186. | 32.3 | Centennial School District 28J / 41,180 |
| 196. | 32.2 | Jewell School District 8 / 931 |
| 197. | 32.1 | Parkrose School District 3 / 26,781 |
Please note that we only rank locations with 'Air Quality Index' data. The rank above might not be a complete list. Locations without 'Air Quality Index' data are not listed.
