73 Illinois water districts with results read from their own annual water quality report or EPA testing, largest first.
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- Chicago2,746,388 people · 7 results
- Aurora183,000 people · 13 results
- Springfield117,444 people · 11 results
- Cicero83,000 people · 14 results
- Palatine70,875 people · 15 results
- Des Plaines60,675 people · 11 results
- Oak Park54,583 people · 10 results
- Wheaton53,970 people · 12 results
- Romeoville50,458 people · 18 results
- Hoffman Estates50,179 people · 9 results
- O Fallon46,603 people · 6 results
- Normal45,841 people · 8 results
- Dekalb45,000 people · 12 results
- Quincy45,000 people · 12 results
- Buffalo Grove43,212 people · 15 results
- Wheeling39,137 people · 13 results
- Addison38,017 people · 14 results
- Calumet City37,000 people · 5 results
- Northbrook34,407 people · 11 results
- Glendale Heights34,208 people · 5 results
- Vernon Hills - Lake Co Pw33,207 people · 7 results
- St Charles33,103 people · 13 results
- Niles29,350 people · 5 results
- Montgomery28,956 people · 12 results
- Glen Ellyn28,850 people · 13 results
- New Lenox27,690 people · 15 results
- Wilmette27,087 people · 15 results
- Edwardsville26,808 people · 16 results
- Oak Forest26,547 people · 5 results
- Chicago Heights26,184 people · 7 results
- Woodstock25,630 people · 12 results
- Morton Grove25,297 people · 12 results
- West Chicago25,166 people · 11 results
- Belvidere25,070 people · 10 results
- Harvey25,000 people · 13 results
- Zion24,413 people · 10 results
- Lisle24,233 people · 13 results
- Melrose Park24,206 people · 13 results
- Loves Park23,335 people · 10 results
- Rolling Meadows23,329 people · 17 results
- Lockport23,100 people · 20 results
- Yorkville23,000 people · 16 results
- Roselle22,897 people · 12 results
- Bloomingdale22,423 people · 12 results
- East Peoria22,284 people · 11 results
- Villa Park22,263 people · 13 results
- Carbondale22,107 people · 14 results
- Darien21,751 people · 13 results
- Blue Island21,494 people · 9 results
- Grayslake21,248 people · 14 results
- Geneva21,247 people · 11 results
- Crest Hill21,169 people · 15 results
- Mokena19,887 people · 12 results
- Lake Zurich19,759 people · 10 results
- Mattoon19,500 people · 8 results
- Deerfield19,196 people · 13 results
- Bellwood19,156 people · 16 results
- Alsip19,063 people · 5 results
- Bensenville18,537 people · 9 results
- Palos Hills18,530 people · 11 results
- Sycamore18,500 people · 4 results
- Justice-Willow Springs Water Commission18,457 people · 4 results
- North Aurora18,350 people · 7 results
- Cary17,826 people · 18 results
- Charleston17,286 people · 8 results
- Morton17,111 people · 10 results
- Troy16,962 people · 12 results
- Bridgeview16,467 people · 11 results
- La Grange16,200 people · 10 results
- Leyden Twsp Water District16,000 people · 4 results
- Warrenville12,350 people · 1 results
- Aqua Illinois-Philo1,378 people · 3 results
- Park Forest12 results
Other districts with a few results read
Search these in the water lookup to see their numbers.
- Aqua Illinois-Kankakee · 80,000 people
- Aqua Illinois-North Maine Utilities · 30,043 people
- Evergreen Park · 19,943 people
- Aqua Illinois-Candlewick Dvn · 6,426 people
- Aqua Illinois-Mchenry Shores · 1,862 people
- Aqua Illinois-Rockwell · 1,762 people