| Rank | Air Quality Index ▼ | School District / Population |
| 1. | 42.2 | Northport School District / 1,581 |
| 2. | 41.9 | Central Valley School District / 77,908 |
| 2. | 41.9 | Warden School District / 4,068 |
| 4. | 41.8 | Onion Creek School District / 378 |
| 5. | 41.7 | Deer Park School District / 10,436 |
| 5. | 41.7 | East Valley School District (Spokane) / 26,463 |
| 5. | 41.7 | Orchard Prairie School District / 760 |
| 8. | 41.6 | Riverside School District / 11,129 |
| 8. | 41.6 | Selkirk School District / 2,224 |
| 10. | 41.5 | Palouse School District / 1,422 |
| 10. | 41.5 | Garfield School District / 632 |
| 10. | 41.5 | Colton School District / 1,198 |
| 10. | 41.5 | Curlew School District / 1,268 |
| 10. | 41.5 | Pullman School District / 32,763 |
| 10. | 41.5 | Newport School District / 8,238 |
| 10. | 41.5 | Nine Mile Falls School District / 9,594 |
| 10. | 41.5 | Mead School District / 51,622 |
| 10. | 41.5 | Orient School District / 997 |
| 10. | 41.5 | Loon Lake School District / 1,649 |
| 20. | 41.3 | Prescott School District / 1,564 |
| 20. | 41.3 | Star School District / 79 |
| 20. | 41.3 | Spokane Public Schools / 221,617 |
| 20. | 41.3 | Kettle Falls School District / 5,479 |
| 20. | 41.3 | West Valley School District / 19,374 |
| 20. | 41.3 | Great Northern School District / 968 |
| 20. | 41.3 | Cusick School District / 1,842 |
| 20. | 41.3 | Tekoa School District / 1,040 |
| 28. | 41.2 | Valley School District / 1,360 |
| 28. | 41.2 | Creston School District / 1,058 |
| 30. | 41.1 | Dayton School District / 3,837 |
| 30. | 41.1 | Chewelah School District / 6,111 |
| 30. | 41.1 | Kahlotus School District / 283 |
| 30. | 41.1 | Colville School District / 11,398 |
| 30. | 41.1 | Othello School District / 14,769 |
| 30. | 41.1 | Dixie School District / 478 |
| 36. | 41.0 | Cheney School District / 34,461 |
| 37. | 40.9 | Washtucna School District / 374 |
| 37. | 40.9 | Lind School District / 985 |
| 37. | 40.9 | Freeman School District / 4,013 |
| 37. | 40.9 | Asotin-Anatone School District / 3,169 |
| 37. | 40.9 | Clarkston School District / 18,858 |
| 42. | 40.8 | Medical Lake School District / 11,325 |
| 42. | 40.8 | Mary Walker School District / 3,060 |
| 42. | 40.8 | Sprague School District / 697 |
| 42. | 40.8 | Columbia School District / 1,171 |
| 42. | 40.8 | Walla Walla School District / 38,110 |
| 42. | 40.8 | Colfax School District / 4,185 |
| 42. | 40.8 | St. John School District / 1,108 |
| 42. | 40.8 | Steptoe School District / 313 |
| 42. | 40.8 | Waitsburg School District / 1,295 |
| 42. | 40.8 | Wellpinit School District / 999 |
| 52. | 40.7 | Davenport School District / 2,970 |
| 52. | 40.7 | Coulee-Hartline School District / 1,579 |
| 52. | 40.7 | Inchelium School District / 1,183 |
| 52. | 40.7 | Evergreen School District (Stevens) / 429 |
| 52. | 40.7 | Reardan-Edwall School District / 4,909 |
| 52. | 40.7 | Keller School District / 430 |
| 52. | 40.7 | Lamont School District / 191 |
| 52. | 40.7 | Nespelem School District / 1,120 |
| 60. | 40.6 | Wilbur School District / 1,237 |
| 60. | 40.6 | Moses Lake School District / 40,936 |
| 60. | 40.6 | Wilson Creek School District / 461 |
| 60. | 40.6 | Pomeroy School District / 2,168 |
| 60. | 40.6 | Starbuck School District / 131 |
| 60. | 40.6 | Liberty School District / 4,450 |
| 60. | 40.6 | Harrington School District / 620 |
| 60. | 40.6 | Odessa School District / 1,431 |
| 60. | 40.6 | Almira School District / 441 |
| 60. | 40.6 | Ephrata School District / 11,355 |
| 70. | 40.5 | Oakesdale School District / 900 |
| 70. | 40.5 | Endicott School District / 497 |
| 70. | 40.5 | Republic School District / 3,751 |
| 73. | 40.5 | Grand Coulee Dam School District / 4,753 |
| 73. | 40.5 | North Franklin School District / 10,061 |
| 73. | 40.5 | Rosalia School District / 1,115 |
| 73. | 40.5 | Ritzville School District / 2,611 |
| 77. | 40.4 | LaCrosse School District / 668 |
| 77. | 40.4 | Benge School District / 118 |
| 77. | 40.4 | Summit Valley School District / 603 |
| 80. | 40.1 | College Place School District / 13,500 |
| 81. | 40.0 | Touchet School District / 1,126 |
| 82. | 39.8 | Finley School District / 5,006 |
| 82. | 39.8 | Columbia School District / 3,466 |
| 84. | 39.6 | Soap Lake School District / 3,285 |
| 84. | 39.6 | Pasco School District / 73,998 |
| 84. | 39.6 | Kennewick School District / 88,498 |
| 87. | 39.2 | Richland School District / 65,458 |
| 88. | 39.0 | Roosevelt School District / 217 |
| 89. | 38.5 | Sunnyside School District / 25,306 |
| 89. | 38.5 | Kiona-Benton School District / 8,106 |
| 89. | 38.5 | Mabton School District / 3,283 |
| 89. | 38.5 | Grandview School District / 15,786 |
| 93. | 38.4 | Prosser School District / 14,382 |
| 93. | 38.4 | Bickleton School District / 461 |
| 95. | 38.3 | Royal School District / 6,709 |
| 95. | 38.3 | Granger School District / 5,943 |
| 97. | 38.2 | Goldendale School District / 6,966 |
| 97. | 38.2 | Paterson School District / 352 |
| 99. | 37.9 | Toppenish School District / 15,652 |
| 99. | 37.9 | Zillah School District / 5,293 |
| 101. | 37.5 | Wapato School District / 13,779 |
| 101. | 37.5 | Naches Valley School District / 8,394 |
| 103. | 37.4 | Klickitat School District / 747 |
| 103. | 37.4 | Thorp School District / 1,422 |
| 103. | 37.4 | Wahluke School District / 8,345 |
| 103. | 37.4 | Centerville School District / 922 |
| 107. | 37.3 | Glenwood School District / 484 |
| 108. | 37.2 | East Valley School District (Yakima) / 15,061 |
| 109. | 37.0 | Yakima School District / 78,730 |
| 109. | 37.0 | Wishram School District / 424 |
| 111. | 36.9 | Trout Lake School District / 876 |
| 111. | 36.9 | Union Gap School District / 3,708 |
| 111. | 36.9 | Highland School District / 5,388 |
| 114. | 36.8 | Mount Adams School District / 4,045 |
| 114. | 36.8 | Selah School District / 18,117 |
| 116. | 36.6 | Ellensburg School District / 26,774 |
| 116. | 36.6 | Sumner School District / 43,664 |
| 118. | 36.5 | Palisades School District / 366 |
| 118. | 36.5 | Kittitas School District / 4,058 |
| 120. | 36.5 | White River School District / 21,088 |
| 120. | 36.5 | Damman School District / 756 |
| 122. | 36.4 | West Valley School District / 28,705 |
| 122. | 36.4 | Eastmont School District / 29,976 |
| 124. | 36.3 | White Salmon Valley School District / 7,396 |
| 124. | 36.3 | Quincy School District / 12,473 |
| 124. | 36.3 | Cle Elum-Roslyn School District / 7,728 |
| 124. | 36.3 | Mill A School District / 498 |
| 128. | 36.2 | Cashmere School District / 8,343 |
| 129. | 36.1 | Wenatchee School District / 43,416 |
| 129. | 36.1 | Orting School District / 13,762 |
| 131. | 36.0 | Lyle School District / 2,549 |
| 131. | 36.0 | White Pass School District / 3,671 |
| 133. | 35.9 | Easton School District / 954 |
| 133. | 35.9 | Dieringer School District / 10,109 |
| 133. | 35.9 | Puyallup School District / 121,755 |
| 136. | 35.7 | Enumclaw School District / 25,760 |
| 136. | 35.7 | Bethel School District / 103,634 |
| 138. | 35.6 | Carbonado School District / 732 |
| 138. | 35.6 | Auburn School District / 86,733 |
| 138. | 35.6 | Fife Public Schools / 21,518 |
| 141. | 35.5 | Steilacoom Historical School District / 20,969 |
| 142. | 35.5 | Rainier School District / 4,955 |
| 143. | 35.1 | Rochester School District / 14,715 |
| 143. | 35.1 | Pe Ell School District / 1,811 |
| 143. | 35.1 | Centralia School District / 22,421 |
| 146. | 35.0 | Chehalis School District / 15,339 |
| 146. | 35.0 | Franklin Pierce School District / 51,245 |
| 146. | 35.0 | Yelm Community Schools / 30,223 |
| 149. | 34.9 | Adna School District / 3,445 |
| 149. | 34.9 | Tenino School District / 9,808 |
| 149. | 34.9 | Eatonville School District / 10,930 |
| 152. | 34.8 | McCleary School District / 3,014 |
| 152. | 34.8 | Clover Park School District / 81,580 |
| 152. | 34.8 | Elma School District / 8,572 |
| 152. | 34.8 | North Beach School District / 7,055 |
| 152. | 34.8 | Willapa Valley School District / 2,300 |
| 157. | 34.7 | Boistfort School District / 1,022 |
| 158. | 34.6 | Tacoma Public Schools / 212,381 |
| 158. | 34.6 | Omak School District / 10,412 |
| 158. | 34.6 | Oakville School District / 2,558 |
| 158. | 34.6 | Hoquiam School District / 10,827 |
| 158. | 34.6 | Okanogan School District / 5,556 |
| 158. | 34.6 | University Place School District / 29,934 |
| 158. | 34.6 | Montesano School District / 8,426 |
| 158. | 34.6 | Satsop School District / 583 |
| 158. | 34.6 | Wishkah Valley School District / 879 |
| 167. | 34.5 | Mansfield School District / 560 |
| 168. | 34.5 | Peninsula School District / 62,980 |
| 168. | 34.5 | Cosmopolis School District / 1,867 |
| 170. | 34.4 | North River School District / 307 |
| 170. | 34.4 | Waterville School District / 2,362 |
| 170. | 34.4 | Onalaska School District / 5,103 |
| 173. | 34.3 | Aberdeen School District / 19,905 |
| 174. | 34.2 | Bridgeport School District / 3,324 |
| 174. | 34.2 | North Thurston Public Schools / 97,287 |
| 176. | 34.1 | Mary M. Knight School District / 1,639 |
| 176. | 34.1 | Grapeview School District / 2,626 |
| 176. | 34.1 | Toledo School District / 4,146 |
| 176. | 34.1 | Southside School District / 2,210 |
| 176. | 34.1 | Ocosta School District / 7,250 |
| 176. | 34.1 | Pioneer School District / 10,416 |
| 176. | 34.1 | Olympia School District / 62,892 |
| 183. | 34.0 | Evaline School District / 647 |
| 183. | 34.0 | Napavine School District / 4,279 |
| 183. | 34.0 | Raymond School District / 4,031 |
| 186. | 33.9 | Oroville School District / 3,998 |
| 186. | 33.9 | Tonasket School District / 7,573 |
| 186. | 33.9 | Federal Way School District / 134,509 |
| 189. | 33.8 | Tumwater School District / 37,970 |
| 189. | 33.8 | Tahoma School District / 39,802 |
| 189. | 33.8 | Morton School District / 2,556 |
| 192. | 33.7 | Stevenson-Carson School District / 5,976 |
| 192. | 33.7 | Orondo School District / 1,547 |
| 192. | 33.7 | Griffin School District / 6,347 |
| 192. | 33.7 | Brewster School District / 4,498 |
| 192. | 33.7 | Sultan School District / 13,382 |
| 197. | 33.6 | Winlock School District / 5,296 |
| 197. | 33.6 | Lake Chelan School District / 7,582 |
| 199. | 33.5 | South Bend School District / 2,446 |
| 200. | 33.5 | Hockinson School District / 8,872 |
| 200. | 33.5 | Battle Ground School District / 67,123 |
| 200. | 33.5 | Pateros School District / 1,430 |
| 200. | 33.5 | Mossyrock School District / 4,049 |
| 204. | 33.4 | Entiat School District / 2,379 |
| 204. | 33.4 | Shelton School District / 23,526 |
| 204. | 33.4 | Manson School District / 3,340 |
| 207. | 33.3 | Evergreen School District (Clark) / 144,158 |
| 207. | 33.3 | Camas School District / 29,911 |
| 209. | 33.2 | Vancouver Public Schools / 145,307 |
| 209. | 33.2 | Washougal School District / 20,325 |
| 209. | 33.2 | Skamania School District / 785 |
| 212. | 33.1 | Cascade School District / 8,854 |
| 212. | 33.1 | Vashon Island School District / 10,447 |
| 212. | 33.1 | North Mason School District / 14,521 |
| 215. | 33.0 | Mount Pleasant School District / 377 |
| 216. | 32.8 | Kent School District / 163,185 |
| 216. | 32.8 | Longview Public Schools / 44,887 |
| 218. | 32.6 | Toutle Lake School District / 3,160 |
| 218. | 32.6 | Hood Canal School District / 5,509 |
| 220. | 32.5 | South Kitsap School District / 66,259 |
| 220. | 32.5 | Highline School District / 128,065 |
| 222. | 32.5 | Ridgefield School District / 14,498 |
| 222. | 32.5 | Lake Quinault School District / 1,145 |
| 224. | 32.4 | Snoqualmie Valley School District / 36,121 |
| 225. | 32.3 | Ocean Beach School District / 9,571 |
| 226. | 32.2 | Kelso School District / 28,516 |
| 226. | 32.2 | Kalama School District / 6,850 |
| 226. | 32.2 | Woodland School District / 10,908 |
| 226. | 32.2 | Green Mountain School District / 1,057 |
| 226. | 32.2 | Naselle-Grays River Valley School District / 2,412 |
| 231. | 32.1 | Castle Rock School District / 10,377 |
| 232. | 32.0 | Wahkiakum School District / 2,894 |
| 232. | 32.0 | Index School District / 608 |
| 234. | 31.9 | La Center School District / 8,523 |
| 234. | 31.9 | Stehekin School District / 7 |
| 234. | 31.9 | Methow Valley School District / 4,979 |
| 234. | 31.9 | Skykomish School District / 430 |
| 238. | 31.8 | Taholah School District / 899 |
| 238. | 31.8 | Riverview School District / 19,629 |
| 240. | 31.4 | Bremerton School District / 45,904 |
| 240. | 31.4 | Renton School District / 118,608 |
| 242. | 31.3 | Queets-Clearwater School District / 789 |
| 243. | 31.2 | Granite Falls School District / 13,740 |
| 244. | 31.0 | Tukwila School District / 18,514 |
| 245. | 30.9 | Lake Stevens School District / 41,019 |
| 245. | 30.9 | Snohomish School District / 52,659 |
| 245. | 30.9 | Everett School District / 134,180 |
| 248. | 30.8 | Sequim School District / 29,833 |
| 248. | 30.8 | Port Angeles School District / 30,792 |
| 250. | 30.7 | South Whidbey School District / 15,586 |
| 251. | 30.6 | Bellevue School District / 128,388 |
| 251. | 30.6 | Monroe School District / 39,271 |
| 253. | 30.5 | Port Townsend School District / 14,284 |
| 253. | 30.5 | Crescent School District / 2,720 |
| 253. | 30.5 | Marysville School District / 71,032 |
| 253. | 30.5 | Mukilteo School District / 96,423 |
| 253. | 30.5 | Mercer Island School District / 23,636 |
| 253. | 30.5 | Quilcene School District / 1,659 |
| 253. | 30.5 | Lakewood School District / 13,903 |
| 260. | 30.4 | Edmonds School District / 159,316 |
| 260. | 30.4 | Shoreline School District / 67,123 |
| 260. | 30.4 | Quillayute Valley School District / 6,383 |
| 260. | 30.4 | Issaquah School District / 105,010 |
| 260. | 30.4 | Coupeville School District / 10,520 |
| 265. | 30.3 | Northshore School District / 128,593 |
| 265. | 30.3 | North Kitsap School District / 47,616 |
| 265. | 30.3 | Lake Washington School District / 186,310 |
| 265. | 30.3 | Seattle School District / 638,610 |
| 269. | 30.1 | Brinnon School District / 1,263 |
| 270. | 30.0 | Chimacum School District / 11,424 |
| 271. | 29.9 | Stanwood-Camano School District / 32,457 |
| 272. | 29.6 | Bainbridge Island School District / 23,206 |
| 273. | 29.5 | Concrete School District / 4,949 |
| 273. | 29.5 | Central Kitsap School District / 70,396 |
| 275. | 29.5 | Darrington School District / 3,279 |
| 276. | 29.4 | Ferndale School District / 30,515 |
| 277. | 29.2 | Cape Flattery School District / 2,855 |
| 277. | 29.2 | Conway School District / 2,969 |
| 279. | 29.1 | Meridian School District / 9,030 |
| 279. | 29.1 | Arlington School District / 30,700 |
| 279. | 29.1 | Bellingham School District / 103,698 |
| 279. | 29.1 | Mount Baker School District / 15,423 |
| 279. | 29.1 | Lynden School District / 18,355 |
| 279. | 29.1 | Nooksack Valley School District / 11,244 |
| 285. | 29.0 | San Juan Island School District / 7,771 |
| 285. | 29.0 | Sedro-Woolley School District / 26,417 |
| 285. | 29.0 | Blaine School District / 16,491 |
| 288. | 28.9 | Shaw Island School District / 221 |
| 288. | 28.9 | Lopez School District / 2,604 |
| 288. | 28.9 | Mount Vernon School District / 38,393 |
| 288. | 28.9 | Burlington-Edison School District / 20,510 |
| 292. | 28.8 | Orcas Island School District / 5,251 |
| 293. | 28.7 | Oak Harbor School District / 37,644 |
| 294. | 28.5 | Anacortes School District / 20,359 |
| 294. | 28.5 | La Conner School District / 4,631 |
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.
