| Rank | Air Quality Index ▼ | School District / Population |
| 1. | 44.5 | Big Foot Union High School District / 9,326 |
| 2. | 44.3 | Fontana Joint No. 8 School District / 2,363 |
| 3. | 44.2 | Walworth Joint No. 1 School District / 4,085 |
| 4. | 44.1 | Elkhorn Area School District / 17,786 |
| 5. | 44.0 | Raymond No. 14 School District / 3,274 |
| 5. | 44.0 | Sharon Joint No. 11 School District / 1,992 |
| 7. | 43.9 | Wilmot Union High School District / 18,848 |
| 8. | 43.7 | Delavan-Darien School District / 17,140 |
| 8. | 43.7 | Waterford Joint No. 1 School District / 13,724 |
| 10. | 43.6 | Greenfield School District / 29,398 |
| 10. | 43.6 | Cudahy School District / 18,321 |
| 10. | 43.6 | Norway Joint No. 7 School District / 1,884 |
| 10. | 43.6 | South Milwaukee School District / 21,210 |
| 10. | 43.6 | Burlington Area School District / 23,139 |
| 10. | 43.6 | St. Francis School District / 9,488 |
| 10. | 43.6 | Oak Creek-Franklin School District / 39,401 |
| 17. | 43.5 | East Troy Community School District / 11,944 |
| 17. | 43.5 | Waterford Union High School District / 18,481 |
| 17. | 43.5 | Muskego-Norway School District / 29,362 |
| 20. | 43.5 | Nicolet Union High School District / 25,523 |
| 20. | 43.5 | Glendale-River Hills School District / 12,747 |
| 22. | 43.4 | Kettle Moraine School District / 24,656 |
| 22. | 43.4 | Wheatland Joint No. 1 School District / 4,408 |
| 22. | 43.4 | Palmyra-Eagle Area School District / 7,515 |
| 22. | 43.4 | Trevor-Wilmot Consolidated School District / 3,586 |
| 26. | 43.3 | Mequon-Thiensville School District / 26,543 |
| 26. | 43.3 | Franklin Public School District / 29,025 |
| 26. | 43.3 | Whitnall School District / 17,477 |
| 26. | 43.3 | Greendale School District / 14,208 |
| 26. | 43.3 | Norris School District / 64 |
| 31. | 43.2 | Lake Country School District / 4,472 |
| 31. | 43.2 | Washington-Caldwell School District / 2,060 |
| 31. | 43.2 | West Allis School District / 68,357 |
| 31. | 43.2 | Williams Bay School District / 3,518 |
| 31. | 43.2 | Hartford Union High School District / 32,054 |
| 36. | 43.1 | Neosho Joint No. 3 School District / 2,081 |
| 36. | 43.1 | Rubicon Joint No. 6 School District / 981 |
| 36. | 43.1 | Kenosha School District / 128,596 |
| 36. | 43.1 | North Cape School District / 813 |
| 36. | 43.1 | Erin School District / 2,564 |
| 41. | 43.0 | Fox Point Joint No. 2 School District / 11,129 |
| 42. | 42.9 | Swallow School District / 3,409 |
| 42. | 42.9 | Arrowhead Union High School District / 34,356 |
| 42. | 42.9 | Shorewood School District / 13,245 |
| 42. | 42.9 | Paris Joint No. 1 School District / 2,038 |
| 42. | 42.9 | Randolph School District / 3,175 |
| 42. | 42.9 | Linn Joint No. 6 School District / 886 |
| 48. | 42.8 | Watertown School District / 30,906 |
| 48. | 42.8 | Cedar Grove-Belgium Area School District / 5,598 |
| 48. | 42.8 | Racine School District / 138,676 |
| 48. | 42.8 | Dodgeland School District / 5,821 |
| 48. | 42.8 | Union Grove Union High School District / 13,314 |
| 48. | 42.8 | Hartford Joint No. 1 School District / 17,750 |
| 54. | 42.7 | Westosha Central High School District / 19,733 |
| 54. | 42.7 | Dover No. 1 School District / 1,821 |
| 54. | 42.7 | Bristol No. 1 School District / 4,914 |
| 54. | 42.7 | Waterloo School District / 5,500 |
| 54. | 42.7 | Whitewater School District / 20,275 |
| 59. | 42.6 | Hustisford School District / 3,356 |
| 59. | 42.6 | Lake Mills Area School District / 9,325 |
| 59. | 42.6 | Brighton No. 1 School District / 1,150 |
| 59. | 42.6 | Oconomowoc Area School District / 33,489 |
| 59. | 42.6 | Silver Lake Joint No. 1 School District / 4,145 |
| 64. | 42.5 | Waukesha School District / 93,541 |
| 64. | 42.5 | Union Grove Joint No. 1 School District / 5,282 |
| 64. | 42.5 | New Berlin School District / 35,101 |
| 64. | 42.5 | Milwaukee School District / 598,035 |
| 64. | 42.5 | Mukwonago School District / 29,112 |
| 69. | 42.5 | Pewaukee School District / 17,369 |
| 69. | 42.5 | Geneva Joint No. 4 School District / 1,127 |
| 69. | 42.5 | Richmond School District / 3,255 |
| 69. | 42.5 | Stone Bank School District / 2,774 |
| 69. | 42.5 | Campbellsport School District / 10,433 |
| 69. | 42.5 | Hartland-Lakeside Joint No. 3 School District / 11,338 |
| 69. | 42.5 | Lake Geneva Joint No. 1 School District / 16,734 |
| 76. | 42.4 | Salem School District / 9,446 |
| 76. | 42.4 | Brown Deer School District / 12,067 |
| 76. | 42.4 | Maple Dale-Indian Hill School District / 1,647 |
| 76. | 42.4 | Yorkville Joint No. 2 School District / 2,875 |
| 76. | 42.4 | Merton Community School District / 6,294 |
| 81. | 42.3 | Port Washington-Saukville School District / 17,300 |
| 81. | 42.3 | Elmbrook School District / 45,085 |
| 81. | 42.3 | Washington School District / 806 |
| 84. | 42.1 | Friess Lake School District / 2,302 |
| 85. | 42.0 | Slinger School District / 15,883 |
| 85. | 42.0 | Milton School District / 19,123 |
| 85. | 42.0 | Wauwatosa School District / 46,838 |
| 85. | 42.0 | Whitefish Bay School District / 14,132 |
| 85. | 42.0 | Cedarburg School District / 19,793 |
| 90. | 41.9 | Edgerton School District / 11,239 |
| 90. | 41.9 | Deerfield Community School District / 4,227 |
| 90. | 41.9 | Grafton School District / 14,235 |
| 90. | 41.9 | Johnson Creek School District / 4,565 |
| 90. | 41.9 | Beaver Dam School District / 22,667 |
| 95. | 41.8 | Linn Joint No. 4 School District / 1,028 |
| 95. | 41.8 | North Lake School District / 2,814 |
| 95. | 41.8 | Northern Ozaukee School District / 5,776 |
| 98. | 41.7 | Lake Geneva-Genoa City Union High School District / 24,342 |
| 98. | 41.7 | Clinton Community School District / 5,897 |
| 98. | 41.7 | Mayville School District / 7,763 |
| 101. | 41.6 | Kewaskum School District / 14,066 |
| 101. | 41.6 | Janesville School District / 62,962 |
| 101. | 41.6 | Benton School District / 1,446 |
| 101. | 41.6 | Argyle School District / 1,959 |
| 101. | 41.6 | Menomonee Falls School District / 29,371 |
| 101. | 41.6 | Monroe School District / 15,685 |
| 101. | 41.6 | Belmont Community School District / 2,176 |
| 101. | 41.6 | Fort Atkinson School District / 18,389 |
| 101. | 41.6 | Hamilton School District / 25,784 |
| 110. | 41.5 | Twin Lakes No. 4 School District / 3,655 |
| 110. | 41.5 | Genoa City Joint No. 2 School District / 5,453 |
| 110. | 41.5 | Randall Joint No. 1 School District / 5,301 |
| 110. | 41.5 | New Glarus School District / 4,752 |
| 114. | 41.5 | Horicon School District / 5,579 |
| 114. | 41.5 | Columbus School District / 7,809 |
| 114. | 41.5 | Lomira School District / 6,736 |
| 114. | 41.5 | Oregon School District / 20,141 |
| 114. | 41.5 | Cambria-Friesland School District / 2,373 |
| 114. | 41.5 | Monticello School District / 2,522 |
| 120. | 41.4 | Kohler School District / 2,410 |
| 120. | 41.4 | Waupun School District / 19,002 |
| 120. | 41.4 | Richfield Joint No. 1 School District / 4,552 |
| 120. | 41.4 | Herman No. 22 School District / 1,824 |
| 120. | 41.4 | Cambridge School District / 5,786 |
| 120. | 41.4 | Sevastopol School District / 5,120 |
| 120. | 41.4 | Sheboygan Falls School District / 11,926 |
| 120. | 41.4 | Waunakee Community School District / 18,546 |
| 120. | 41.4 | Prescott School District / 7,902 |
| 129. | 41.3 | New Holstein School District / 8,948 |
| 129. | 41.3 | Plymouth School District / 17,055 |
| 129. | 41.3 | Germantown School District / 25,594 |
| 129. | 41.3 | Valders Area School District / 6,970 |
| 133. | 41.2 | Jefferson School District / 13,304 |
| 133. | 41.2 | Random Lake School District / 5,687 |
| 133. | 41.2 | Oostburg School District / 6,422 |
| 133. | 41.2 | Shullsburg School District / 2,172 |
| 133. | 41.2 | Dodgeville School District / 8,188 |
| 133. | 41.2 | Seneca School District / 1,618 |
| 133. | 41.2 | Sheboygan Area School District / 60,517 |
| 133. | 41.2 | West Bend School District / 51,889 |
| 141. | 41.1 | Brodhead School District / 6,436 |
| 141. | 41.1 | Wisconsin Dells School District / 11,762 |
| 141. | 41.1 | Beloit Turner School District / 8,795 |
| 141. | 41.1 | Parkview School District / 6,208 |
| 141. | 41.1 | Beloit School District / 36,451 |
| 141. | 41.1 | Juda School District / 1,258 |
| 141. | 41.1 | Mishicot School District / 5,971 |
| 148. | 41.0 | Portage Community School District / 17,320 |
| 148. | 41.0 | Two Rivers School District / 13,011 |
| 148. | 41.0 | Black Hawk School District / 2,526 |
| 148. | 41.0 | Rio Community School District / 2,978 |
| 148. | 41.0 | Verona Area School District / 40,475 |
| 153. | 40.9 | Shiocton School District / 4,046 |
| 153. | 40.9 | Sturgeon Bay School District / 8,317 |
| 153. | 40.9 | Green Lake School District / 2,598 |
| 153. | 40.9 | Cuba City School District / 4,821 |
| 153. | 40.9 | Iowa-Grant School District / 4,543 |
| 153. | 40.9 | Southwestern Wisconsin School District / 3,795 |
| 159. | 40.8 | Belleville School District / 5,552 |
| 159. | 40.8 | Montello School District / 6,151 |
| 159. | 40.8 | Evansville Community School District / 9,575 |
| 159. | 40.8 | Stoughton Area School District / 21,018 |
| 159. | 40.8 | New London School District / 15,469 |
| 159. | 40.8 | Fall River School District / 2,796 |
| 165. | 40.7 | Barneveld School District / 2,277 |
| 165. | 40.7 | Weyerhaeuser Area School District / 1,157 |
| 165. | 40.7 | St. Croix Central School District / 7,585 |
| 165. | 40.7 | Amery School District / 9,808 |
| 165. | 40.7 | Unity School District / 7,384 |
| 165. | 40.7 | Shell Lake School District / 3,581 |
| 165. | 40.7 | Hudson School District / 30,864 |
| 165. | 40.7 | Baldwin-Woodville Area School District / 8,359 |
| 165. | 40.7 | Luck School District / 3,501 |
| 165. | 40.7 | Somerset School District / 8,083 |
| 165. | 40.7 | Markesan School District / 6,710 |
| 165. | 40.7 | Turtle Lake School District / 3,201 |
| 165. | 40.7 | Sun Prairie Area School District / 42,859 |
| 165. | 40.7 | Barron Area School District / 8,722 |
| 165. | 40.7 | Glenwood City School District / 3,926 |
| 165. | 40.7 | Colfax School District / 4,639 |
| 165. | 40.7 | Oakfield School District / 3,270 |
| 165. | 40.7 | Rice Lake Area School District / 16,053 |
| 165. | 40.7 | Cameron School District / 4,973 |
| 165. | 40.7 | Chetek School District / 6,980 |
| 165. | 40.7 | Osceola School District / 8,963 |
| 165. | 40.7 | Clayton School District / 2,071 |
| 165. | 40.7 | Clear Lake School District / 3,261 |
| 165. | 40.7 | Prairie Farm School District / 1,808 |
| 165. | 40.7 | Cumberland School District / 5,692 |
| 165. | 40.7 | New Richmond School District / 17,211 |
| 165. | 40.7 | New Auburn School District / 1,862 |
| 165. | 40.7 | Bloomer School District / 7,337 |
| 165. | 40.7 | Birchwood School District / 2,122 |
| 165. | 40.7 | Chippewa Falls Area School District / 33,735 |
| 165. | 40.7 | St. Croix Falls School District / 6,783 |
| 165. | 40.7 | Boyceville Community School District / 4,372 |
| 197. | 40.6 | Fond du Lac School District / 53,083 |
| 197. | 40.6 | McFarland School District / 10,523 |
| 197. | 40.6 | Platteville School District / 15,055 |
| 197. | 40.6 | DeForest Area School District / 20,770 |
| 197. | 40.6 | Lodi School District / 9,645 |
| 197. | 40.6 | Westfield School District / 9,240 |
| 197. | 40.6 | Waupaca School District / 15,698 |
| 204. | 40.5 | La Farge School District / 1,895 |
| 204. | 40.5 | Tigerton School District / 2,020 |
| 204. | 40.5 | Pardeeville Area School District / 7,116 |
| 204. | 40.5 | Manawa School District / 5,076 |
| 208. | 40.5 | New Lisbon School District / 5,231 |
| 208. | 40.5 | Middleton-Cross Plains School District / 39,214 |
| 208. | 40.5 | Princeton School District / 3,128 |
| 208. | 40.5 | Oshkosh Area School District / 80,425 |
| 208. | 40.5 | Marshall School District / 5,829 |
| 208. | 40.5 | Ripon Area School District / 10,739 |
| 208. | 40.5 | Monona Grove School District / 17,583 |
| 208. | 40.5 | Gillett School District / 3,877 |
| 208. | 40.5 | Albany School District / 2,827 |
| 208. | 40.5 | Adams-Friendship Area School District / 14,373 |
| 208. | 40.5 | North Crawford School District / 3,141 |
| 208. | 40.5 | Boscobel Area School District / 5,662 |
| 208. | 40.5 | Royall School District / 4,020 |
| 221. | 40.4 | Hillsboro School District / 4,328 |
| 221. | 40.4 | Pecatonica Area School District / 2,845 |
| 221. | 40.4 | Mineral Point School District / 4,379 |
| 221. | 40.4 | Holmen School District / 19,880 |
| 221. | 40.4 | Melrose-Mindoro School District / 4,359 |
| 221. | 40.4 | Highland School District / 1,564 |
| 221. | 40.4 | Mauston School District / 9,862 |
| 221. | 40.4 | Howards Grove School District / 5,885 |
| 221. | 40.4 | Pepin Area School District / 1,963 |
| 221. | 40.4 | North Fond du Lac School District / 7,716 |
| 221. | 40.4 | Fennimore Community School District / 4,720 |
| 221. | 40.4 | Southern Door County School District / 7,913 |
| 233. | 40.3 | Poynette School District / 6,358 |
| 233. | 40.3 | Cochrane-Fountain City School District / 4,629 |
| 233. | 40.3 | Luxemburg-Casco School District / 10,957 |
| 233. | 40.3 | Clintonville School District / 10,063 |
| 233. | 40.3 | Gibraltar Area School District / 5,633 |
| 233. | 40.3 | Rosholt School District / 3,824 |
| 233. | 40.3 | Richland School District / 11,095 |
| 233. | 40.3 | Galesville-Ettrick-Trempealeau School District / 8,770 |
| 233. | 40.3 | Rosendale-Brandon School District / 5,591 |
| 233. | 40.3 | Reedsburg School District / 17,008 |
| 233. | 40.3 | Iola-Scandinavia School District / 4,642 |
| 233. | 40.3 | Alma School District / 1,515 |
| 233. | 40.3 | Wonewoc-Union Center School District / 3,370 |
| 233. | 40.3 | Madison Metropolitan School District / 231,979 |
| 233. | 40.3 | Weston School District / 2,401 |
| 248. | 40.2 | Seymour Community School District / 13,166 |
| 248. | 40.2 | Westby Area School District / 7,902 |
| 248. | 40.2 | Little Chute Area School District / 8,423 |
| 248. | 40.2 | Sauk Prairie School District / 16,021 |
| 248. | 40.2 | Sparta Area School District / 17,128 |
| 248. | 40.2 | Darlington Community School District / 5,207 |
| 248. | 40.2 | Viroqua Area School District / 8,605 |
| 248. | 40.2 | Mount Horeb Area School District / 12,578 |
| 248. | 40.2 | Hilbert School District / 2,902 |
| 248. | 40.2 | Ithaca School District / 1,620 |
| 248. | 40.2 | Marinette School District / 15,256 |
| 259. | 40.1 | Gresham School District / 1,918 |
| 259. | 40.1 | Wauzeka-Steuben School District / 1,585 |
| 259. | 40.1 | De Soto Area School District / 4,209 |
| 259. | 40.1 | Elk Mound Area School District / 4,900 |
| 259. | 40.1 | Riverdale School District / 4,998 |
| 259. | 40.1 | Freedom Area School District / 9,112 |
| 259. | 40.1 | Brillion School District / 5,576 |
| 259. | 40.1 | Kiel Area School District / 8,805 |
| 259. | 40.1 | Elmwood School District / 2,162 |
| 259. | 40.1 | Eau Claire Area School District / 82,084 |
| 259. | 40.1 | Kaukauna Area School District / 22,970 |
| 259. | 40.1 | Manitowoc School District / 38,734 |
| 259. | 40.1 | Menomonie Area School District / 27,332 |
| 259. | 40.1 | Spring Valley School District / 4,398 |
| 259. | 40.1 | Ashwaubenon School District / 16,070 |
| 274. | 40.0 | Kimberly Area School District / 26,314 |
| 274. | 40.0 | Norwalk-Ontario-Wilton School District / 4,425 |
| 274. | 40.0 | Altoona School District / 9,149 |
| 274. | 40.0 | Tomorrow River School District / 4,822 |
| 274. | 40.0 | Omro School District / 7,929 |
| 274. | 40.0 | Onalaska School District / 17,696 |
| 274. | 40.0 | Green Bay Area School District / 137,011 |
| 274. | 40.0 | Winneconne Community School District / 8,945 |
| 274. | 40.0 | Bangor School District / 4,002 |
| 274. | 40.0 | West Salem School District / 9,879 |
| 274. | 40.0 | Blair-Taylor School District / 4,291 |
| 274. | 40.0 | Berlin Area School District / 10,437 |
| 274. | 40.0 | Weyauwega-Fremont School District / 6,939 |
| 287. | 39.9 | Potosi School District / 2,344 |
| 287. | 39.9 | Elkhart Lake-Glenbeulah School District / 3,687 |
| 287. | 39.9 | Bonduel School District / 6,393 |
| 287. | 39.9 | Marshfield School District / 27,462 |
| 287. | 39.9 | Prairie du Chien Area School District / 8,493 |
| 287. | 39.9 | Algoma School District / 5,297 |
| 293. | 39.8 | Peshtigo School District / 6,305 |
| 293. | 39.8 | Oconto Falls School District / 10,837 |
| 293. | 39.8 | River Falls School District / 22,810 |
| 293. | 39.8 | Siren School District / 2,885 |
| 293. | 39.8 | Stockbridge School District / 1,817 |
| 293. | 39.8 | River Valley School District / 9,430 |
| 293. | 39.8 | Granton Area School District / 2,223 |
| 293. | 39.8 | Oconto School District / 7,416 |
| 293. | 39.8 | Frederic School District / 3,563 |
| 293. | 39.8 | Lancaster Community School District / 6,028 |
| 293. | 39.8 | Neenah School District / 44,156 |
| 304. | 39.7 | Marion School District / 3,950 |
| 304. | 39.7 | Chilton School District / 7,148 |
| 304. | 39.7 | River Ridge School District / 3,807 |
| 304. | 39.7 | Greenwood School District / 3,335 |
| 304. | 39.7 | Cashton School District / 3,579 |
| 304. | 39.7 | Black River Falls School District / 12,464 |
| 304. | 39.7 | Kickapoo Area School District / 3,162 |
| 304. | 39.7 | La Crosse School District / 63,606 |
| 304. | 39.7 | Neillsville School District / 6,318 |
| 304. | 39.7 | Reedsville School District / 4,692 |
| 304. | 39.7 | De Pere Unified School District / 21,636 |
| 304. | 39.7 | Arcadia School District / 5,779 |
| 304. | 39.7 | Kewaunee School District / 6,889 |
| 304. | 39.7 | Menominee Indian School District / 4,382 |
| 318. | 39.6 | Wisconsin Heights School District / 5,965 |
| 318. | 39.6 | Shawano School District / 17,293 |
| 318. | 39.6 | Loyal School District / 4,064 |
| 318. | 39.6 | Cassville School District / 2,088 |
| 318. | 39.6 | Pittsville School District / 4,042 |
| 318. | 39.6 | Wrightstown Community School District / 7,476 |
| 318. | 39.6 | Plum City School District / 1,836 |
| 325. | 39.5 | Appleton Area School District / 95,613 |
| 325. | 39.5 | Whitehall School District / 5,016 |
| 325. | 39.5 | Tomah Area School District / 20,794 |
| 325. | 39.5 | Gilmanton School District / 1,052 |
| 325. | 39.5 | Baraboo School District / 20,321 |
| 330. | 39.5 | Independence School District / 2,561 |
| 330. | 39.5 | Wild Rose School District / 5,153 |
| 332. | 39.4 | Alma Center School District / 3,097 |
| 332. | 39.4 | Denmark School District / 8,500 |
| 332. | 39.4 | Lena School District / 2,588 |
| 332. | 39.4 | Wisconsin Rapids School District / 34,912 |
| 332. | 39.4 | Augusta School District / 4,598 |
| 332. | 39.4 | Pulaski Community School District / 19,880 |
| 332. | 39.4 | Durand School District / 7,216 |
| 332. | 39.4 | West De Pere School District / 21,072 |
| 332. | 39.4 | Ellsworth Community School District / 10,828 |
| 332. | 39.4 | Necedah Area School District / 4,803 |
| 342. | 39.3 | Nekoosa School District / 8,698 |
| 342. | 39.3 | Port Edwards School District / 3,622 |
| 342. | 39.3 | Lake Holcombe School District / 2,374 |
| 345. | 39.2 | Eleva-Strum School District / 3,668 |
| 345. | 39.2 | Menasha School District / 25,218 |
| 345. | 39.2 | Osseo-Fairchild School District / 5,585 |
| 345. | 39.2 | Howard-Suamico School District / 29,717 |
| 345. | 39.2 | Hortonville School District / 20,062 |
| 350. | 39.1 | Wautoma Area School District / 11,191 |
| 351. | 39.0 | Almond-Bancroft School District / 2,999 |
| 351. | 39.0 | Tri-County Area School District / 3,834 |
| 353. | 38.9 | Auburndale School District / 4,651 |
| 354. | 38.8 | Fall Creek School District / 3,983 |
| 355. | 38.7 | Stevens Point Area School District / 56,966 |
| 356. | 38.6 | Grantsburg School District / 4,821 |
| 356. | 38.6 | Stratford School District / 5,380 |
| 356. | 38.6 | Cadott Community School District / 5,058 |
| 359. | 38.5 | Mondovi School District / 5,877 |
| 360. | 38.5 | Marathon City School District / 4,688 |
| 361. | 38.4 | Edgar School District / 3,713 |
| 361. | 38.4 | Stanley-Boyd Area School District / 7,760 |
| 361. | 38.4 | Abbotsford School District / 3,735 |
| 361. | 38.4 | Wittenberg-Birnamwood School District / 7,656 |
| 361. | 38.4 | Rib Lake School District / 2,704 |
| 366. | 38.3 | Spencer School District / 4,659 |
| 366. | 38.3 | Cornell School District / 2,795 |
| 366. | 38.3 | D.C. Everest Area School District / 34,571 |
| 366. | 38.3 | Bowler School District / 2,769 |
| 370. | 38.2 | Colby School District / 6,678 |
| 370. | 38.2 | Wausau School District / 54,341 |
| 372. | 38.1 | Owen-Withee School District / 4,552 |
| 372. | 38.1 | Mosinee School District / 11,575 |
| 372. | 38.1 | Bruce School District / 3,675 |
| 372. | 38.1 | Thorp School District / 4,434 |
| 376. | 38.0 | Coleman School District / 4,951 |
| 376. | 38.0 | Merrill Area School District / 20,594 |
| 378. | 37.9 | Medford Area School District / 14,425 |
| 378. | 37.9 | Gilman School District / 3,025 |
| 378. | 37.9 | Athens School District / 4,181 |
| 381. | 37.7 | Antigo School District / 17,801 |
| 381. | 37.7 | Suring School District / 4,052 |
| 381. | 37.7 | Flambeau School District / 4,318 |
| 381. | 37.7 | Lakeland Union High School District / 17,992 |
| 381. | 37.7 | Phillips School District / 5,899 |
| 386. | 37.6 | Wausaukee School District / 4,075 |
| 386. | 37.6 | Woodruff Joint No. 1 School District / 5,252 |
| 386. | 37.6 | Phelps School District / 1,285 |
| 386. | 37.6 | Rhinelander School District / 20,306 |
| 386. | 37.6 | North Lakeland School District / 2,617 |
| 386. | 37.6 | Northland Pines School District / 11,239 |
| 386. | 37.6 | Tomahawk School District / 10,012 |
| 386. | 37.6 | Beecher-Dunbar-Pembine School District / 2,555 |
| 394. | 37.5 | Florence School District / 4,473 |
| 394. | 37.5 | Goodman-Armstrong School District / 1,132 |
| 394. | 37.5 | Niagara School District / 2,475 |
| 394. | 37.5 | Crandon School District / 5,831 |
| 394. | 37.5 | Lac du Flambeau No. 1 School District / 3,439 |
| 399. | 37.5 | Three Lakes School District / 3,974 |
| 400. | 37.4 | White Lake School District / 1,431 |
| 401. | 37.3 | Prentice School District / 3,034 |
| 401. | 37.3 | Elcho School District / 3,145 |
| 401. | 37.3 | Wabeno Area School District / 3,669 |
| 404. | 37.2 | Ladysmith-Hawkins School District / 5,256 |
| 405. | 37.1 | Minocqua Joint No. 1 School District / 6,684 |
| 405. | 37.1 | Laona School District / 1,317 |
| 405. | 37.1 | Mercer School District / 1,354 |
| 405. | 37.1 | Crivitz School District / 5,945 |
| 409. | 36.8 | Chequamegon School District / 6,563 |
| 410. | 36.3 | Hurley School District / 4,190 |
| 411. | 36.1 | Butternut School District / 1,282 |
| 412. | 36.0 | Winter School District / 2,702 |
| 413. | 35.7 | Mellen School District / 1,913 |
| 414. | 35.2 | Ashland School District / 12,363 |
| 415. | 35.1 | Spooner Area School District / 10,344 |
| 416. | 34.6 | Drummond Area School District / 4,565 |
| 416. | 34.6 | Solon Springs School District / 2,049 |
| 416. | 34.6 | Northwood School District / 2,909 |
| 419. | 34.5 | Bayfield School District / 2,763 |
| 419. | 34.5 | Webster School District / 5,650 |
| 421. | 34.5 | Hayward Community School District / 13,434 |
| 422. | 34.3 | Superior School District / 33,504 |
| 423. | 33.9 | Washburn School District / 3,836 |
| 424. | 33.5 | South Shore School District / 1,630 |
| 425. | 33.2 | Maple School District / 8,147 |
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.
