Water Quality in Colorado
1,048 water systems • 313 cities • EPA SDWIS Data
1,048
Water Systems
42,596
Total Violations
5,256
Health-Based Violations
7,175,420
Population Served
Overview
Colorado has 1,048 active community water systems serving 7,175,420 people. These systems have accumulated 42,596 EPA Safe Drinking Water Act violations on record, of which 5,256 are health-based violations (meaning a contaminant exceeded safe levels).
Common contaminants found in violations: Chlorine, TTHM, Selenium, Chlorine Dioxide, E. coli, Nitrate, Stage 2 DBP, Disinfection Byproducts, Barium, HAA5.
Cities with Most Violations in Colorado
| # | City | Violations | Health-Based | Water Systems | Population |
|---|---|---|---|---|---|
| 1 | Colorado Springs | 2,017 | 110 | 36 | 567,087 |
| 2 | Durango | 1,243 | 77 | 36 | 47,184 |
| 3 | Windsor | 1,133 | 55 | 16 | 29,533 |
| 4 | Monte Vista | 958 | 5 | 2 | 4,636 |
| 5 | Carbondale | 840 | 121 | 18 | 8,113 |
| 6 | Hotchkiss | 704 | 46 | 7 | 3,765 |
| 7 | Divide | 655 | 78 | 7 | 2,853 |
| 8 | Crawford | 655 | 28 | 5 | 1,469 |
| 9 | Manzanola | 651 | 413 | 4 | 967 |
| 10 | Rocky Ford | 649 | 313 | 8 | 6,028 |
Largest Cities in Colorado
| # | City | Population | Violations | Water Systems |
|---|---|---|---|---|
| 1 | Denver | 1,359,013 | 428 | 22 |
| 2 | Aurora | 604,019 | 367 | 13 |
| 3 | Colorado Springs | 567,087 | 2,017 | 36 |
| 4 | Fort Collins | 303,541 | 137 | 10 |
| 5 | Lakewood | 260,762 | 249 | 54 |
| 6 | Thornton | 230,581 | 295 | 5 |
| 7 | Westminster | 203,655 | 77 | 3 |
| 8 | Arvada | 173,420 | 18 | 3 |
| 9 | Boulder | 170,165 | 91 | 9 |
| 10 | Greeley | 141,047 | 106 | 8 |
All Cities in Colorado
| City | Population | Violations | Health Violations | Contaminants |
|---|---|---|---|---|
| Denver | 1,359,013 | 428 | 6 | Chlorine, Selenium |
| Aurora | 604,019 | 367 | 9 | Chlorine, Chlorine Dioxide, Disinfection Byproducts |
| Colorado Springs | 567,087 | 2,017 | 110 | Chlorine, Chlorine Dioxide, Contaminant 2920 +7 more |
| Fort Collins | 303,541 | 137 | 5 | Chlorine, Disinfection Byproducts, E. coli +1 more |
| Lakewood | 260,762 | 249 | 16 | Chlorine, Chlorine Dioxide, Disinfection Byproducts +2 more |
| Thornton | 230,581 | 295 | 4 | Chlorine |
| Westminster | 203,655 | 77 | 2 | Chlorine |
| Arvada | 173,420 | 18 | 0 | |
| Boulder | 170,165 | 91 | 8 | Chlorine, Disinfection Byproducts, Total Haloacetic Acids (HAA5) |
| Greeley | 141,047 | 106 | 19 | Chlorine, Chlorine Dioxide, Disinfection Byproducts +2 more |
| Littleton | 126,724 | 142 | 5 | Chlorine, Fecal Coliform |
| Pueblo | 126,713 | 166 | 14 | Chlorine, Chlorine Dioxide, Fecal Coliform |
| Grand Junction | 117,707 | 76 | 0 | |
| Castle Rock | 115,659 | 138 | 36 | Chlorine, Disinfection Byproducts, Total Organic Carbon |
| Broomfield | 109,723 | 48 | 7 | Chlorine, Disinfection Byproducts |
| Centennial | 106,671 | 232 | 26 | Total Organic Carbon |
| Longmont | 106,066 | 8 | 0 | |
| Parker | 104,687 | 48 | 1 | HAA5 |
| Highlands Ranch | 104,642 | 22 | 0 | |
| Englewood | 100,134 | 104 | 28 | E. coli, Total Organic Carbon |
| Loveland | 96,801 | 348 | 19 | Chlorine, E. coli, Fecal Coliform +1 more |
| Commerce City | 74,341 | 0 | 0 | |
| Brighton | 64,569 | 300 | 17 | Chlorine, Chlorine Dioxide, Stage 2 DBP +1 more |
| Golden | 53,471 | 31 | 0 | |
| Montrose | 51,712 | 220 | 7 | Chlorine |
| Vail | 51,515 | 0 | 0 | |
| Northglenn | 48,927 | 0 | 0 | |
| Fort Carson | 48,000 | 13 | 0 | |
| Durango | 47,184 | 1,243 | 77 | Chlorine, Chlorine Dioxide, Contaminant 2920 +5 more |
| Wheat Ridge | 42,275 | 261 | 91 | Chlorine, Chlorine Dioxide, Disinfection Byproducts +5 more |
| Berthoud | 40,361 | 79 | 6 | Contaminant 2920, Fecal Coliform |
| Erie | 40,102 | 128 | 0 | |
| Canon City | 38,878 | 15 | 4 | TTHM |
| Clifton | 35,300 | 10 | 1 | E. coli |
| Aspen | 32,562 | 91 | 1 | Chlorine |
| Lafayette | 32,266 | 285 | 5 | Chlorine, Chlorine Dioxide, E. coli +1 more |
| Monument | 31,378 | 122 | 40 | Chlorine, Chlorine Dioxide, Fecal Coliform +1 more |
| Pueblo West | 30,215 | 81 | 7 | Chlorine, E. coli, TTHM |
| Steamboat Springs | 29,846 | 525 | 32 | Chlorine, Chlorine Dioxide, Contaminant 2920 +5 more |
| Windsor | 29,533 | 1,133 | 55 | Barium, Chlorine, Fecal Coliform +2 more |
| Breckenridge | 28,315 | 43 | 6 | Fecal Coliform |
| Firestone | 28,239 | 20 | 0 | |
| Fountain | 26,486 | 46 | 1 | Chlorine |
| Johnstown | 24,725 | 87 | 4 | Contaminant 2920, Fecal Coliform |
| Estes Park | 21,949 | 293 | 69 | Disinfection Byproducts, E. coli, Fecal Coliform +5 more |
| Louisville | 20,975 | 29 | 4 | E. coli, Fecal Coliform |
| Evans | 20,610 | 15 | 0 | |
| Niwot | 20,280 | 10 | 0 | |
| Fort Morgan | 20,116 | 26 | 0 | |
| Greenwood Village | 19,983 | 358 | 21 | Chlorine, E. coli, Fecal Coliform |
| Falcon | 18,927 | 144 | 1 | Disinfection Byproducts |
| Superior | 17,900 | 9 | 5 | Fecal Coliform |
| Frederick | 17,827 | 21 | 1 | Chlorine |
| Evergreen | 17,045 | 251 | 71 | Bromate, Chlorine, Disinfection Byproducts +5 more |
| Usaf Academy | 16,876 | 27 | 1 | Total Haloacetic Acids (HAA5) |
| Glenwood Springs | 16,675 | 233 | 14 | Chlorine, Disinfection Byproducts, Fecal Coliform +1 more |
| Wellington | 16,175 | 66 | 9 | Chlorine, E. coli |
| Lucerne | 15,890 | 2 | 0 | |
| Dolores | 15,423 | 44 | 0 | |
| Sterling | 15,323 | 126 | 0 | |
| Gypsum | 15,272 | 9 | 0 | |
| Black Hawk | 15,167 | 31 | 0 | |
| Fort Lupton | 14,013 | 265 | 50 | Chlorine, E. coli, Fecal Coliform +1 more |
| Peyton | 13,616 | 43 | 2 | Disinfection Byproducts |
| Trinidad | 13,361 | 298 | 8 | Chlorine, Chlorine Dioxide, E. coli +2 more |
| Castle Pines | 12,800 | 88 | 0 | |
| Alamosa | 12,758 | 496 | 19 | Chlorine, Chlorine Dioxide, E. coli |
| Pagosa Springs | 12,434 | 309 | 8 | Chlorine, E. coli |
| Winter Park | 12,093 | 189 | 8 | Chlorine Dioxide, E. coli |
| Silverthorne | 11,778 | 66 | 0 | |
| Severance | 11,733 | 25 | 0 | |
| Federal Heights | 11,678 | 1 | 0 | |
| Gunnison | 10,754 | 46 | 0 | |
| Rifle | 10,601 | 379 | 158 | Chlorine, HAA5, Haloacetic Acids +1 more |
| Keystone | 10,570 | 8 | 1 | Disinfection Byproducts |
| Idaho Springs | 10,432 | 23 | 0 | |
| La Junta | 10,097 | 629 | 420 | Chlorine, E. coli, HAA5 +1 more |
| Morrison | 9,970 | 42 | 0 | |
| Redvale | 9,825 | 609 | 0 | |
| Cortez | 9,556 | 62 | 6 | Chlorine, E. coli, Stage 2 DBP |
| Milliken | 9,200 | 23 | 0 | |
| Dillon | 9,018 | 37 | 0 | |
| Craig | 8,930 | 117 | 0 | |
| Telluride | 8,830 | 388 | 23 | Barium, Chlorine, Disinfection Byproducts +1 more |
| Delta | 8,700 | 1 | 0 | |
| Woodland | 8,500 | 52 | 1 | Stage 2 DBP |
| Cedaredge | 8,151 | 346 | 56 | Disinfection Byproducts, E. coli, Fecal Coliform +1 more |
| Lamar | 8,138 | 24 | 7 | Chlorine, Total Organic Carbon |
| Basalt | 8,130 | 507 | 8 | Chlorine, Chlorine Dioxide, Fecal Coliform |
| Carbondale | 8,113 | 840 | 121 | Barium, Chlorine, Chlorine Dioxide +3 more |
| Florence | 8,026 | 85 | 2 | Chlorine, Contaminant 2920 |
| Leadville | 7,870 | 619 | 1 | Chlorine Dioxide |
| Eagle | 7,641 | 149 | 4 | Chlorine, Gross Alpha |
| Eaton | 7,328 | 23 | 3 | Chlorine |
| Manitou Springs | 6,938 | 5 | 5 | Chlorine, E. coli |
| Dacono | 6,900 | 9 | 3 | Chlorine |
| Lochbuie | 6,830 | 9 | 0 | |
| Buena Vista | 6,581 | 114 | 0 | |
| New Castle | 6,465 | 24 | 1 | Fecal Coliform |
| Limon | 6,369 | 13 | 0 | |
| Snowmass Village | 6,353 | 17 | 3 | Fecal Coliform |
| Rocky Ford | 6,028 | 649 | 313 | Chlorine, Contaminant 1011, Disinfection Byproducts +2 more |
| Bayfield | 5,993 | 240 | 20 | Chlorine, E. coli, Fecal Coliform +1 more |
| Salida | 5,806 | 191 | 3 | Chlorine |
| Copper Mountain | 5,785 | 1 | 0 | |
| Crested Butte | 5,668 | 65 | 3 | Fecal Coliform |
| Fraser | 5,475 | 122 | 0 | |
| Hillrose | 5,432 | 5 | 0 | |
| Georgetown | 5,315 | 3 | 0 | |
| Edgewater | 5,300 | 1 | 0 | |
| Elizabeth | 5,202 | 36 | 2 | Chlorine |
| Granby | 5,003 | 62 | 1 | Disinfection Byproducts |
| Keenesburg | 4,936 | 21 | 4 | TTHM |
| Frisco | 4,694 | 330 | 5 | Chlorine, Chlorine Dioxide, Disinfection Byproducts |
| Glendale | 4,689 | 19 | 0 | |
| Monte Vista | 4,636 | 958 | 5 | Barium, Chlorine, Stage 2 DBP |
| Bennett | 4,400 | 11 | 0 | |
| Walsenburg | 4,329 | 213 | 30 | Chlorine, Chlorine Dioxide, E. coli +3 more |
| Ault | 4,220 | 15 | 0 | |
| Larkspur | 4,165 | 175 | 20 | Total Organic Carbon |
| Administrative Contact | 4,161 | 466 | 12 | Chlorine, Chlorine Dioxide, Disinfection Byproducts +2 more |
| Yuma | 4,049 | 179 | 0 | |
| La Porte | 4,000 | 19 | 0 | |
| Hayden | 3,942 | 383 | 0 | |
| Paonia | 3,847 | 569 | 42 | Chlorine, Chlorine Dioxide, Disinfection Byproducts +2 more |
| Silt | 3,808 | 85 | 11 | Chlorine, Selenium |
| Hotchkiss | 3,765 | 704 | 46 | Chlorine, Chlorine Dioxide, Disinfection Byproducts +4 more |
| Central City | 3,750 | 45 | 0 | |
| Lyons | 3,735 | 87 | 46 | Chlorine Dioxide, Disinfection Byproducts, E. coli +3 more |
| Burlington | 3,720 | 85 | 83 | Selenium |
| Watkins | 3,702 | 293 | 1 | Disinfection Byproducts |
| Mount Crested Butte | 3,546 | 15 | 0 | |
| Hudson | 3,500 | 274 | 12 | TTHM |
| Cripple Creek | 3,491 | 32 | 0 | |
| Grand Lake | 3,371 | 15 | 2 | Disinfection Byproducts |
| Penrose | 3,149 | 22 | 3 | Fecal Coliform |
| Austin | 3,100 | 16 | 0 | |
| Palisade | 3,060 | 51 | 0 | |
| Palmer Lake | 3,044 | 187 | 40 | Chlorine, Chlorine Dioxide, Total Organic Carbon |
| Olathe | 3,015 | 4 | 0 | |
| Platteville | 2,900 | 14 | 0 | |
| Divide | 2,853 | 655 | 78 | Chlorine, Contaminant 2920, Disinfection Byproducts +3 more |
| Colorado City | 2,755 | 296 | 87 | Chlorine Dioxide, Contaminant 1008, E. coli +3 more |
| Mancos | 2,690 | 45 | 0 | |
| Holyoke | 2,672 | 25 | 1 | Chlorine |
| Center | 2,575 | 24 | 0 | |
| Meeker | 2,551 | 57 | 4 | Disinfection Byproducts |
| Rangely | 2,495 | 21 | 0 | |
| Woodland Park | 2,447 | 221 | 49 | Chlorine, Chlorine Dioxide, Disinfection Byproducts +1 more |
| Las Animas | 2,439 | 25 | 1 | Chlorine Dioxide |
| Kremmling | 2,409 | 39 | 5 | Chlorine Dioxide, E. coli |
| Nederland | 2,406 | 7 | 3 | Disinfection Byproducts |
| Silverton | 2,387 | 6 | 1 | Chlorine |
| Los Angeles | 2,379 | 28 | 1 | Chlorine |
| Akron | 2,379 | 15 | 2 | Chlorine |
| Wray | 2,342 | 15 | 0 | |
| Ordway | 2,303 | 52 | 1 | Chlorine |
| Crestone | 2,299 | 44 | 2 | Chlorine |
| Strasburg | 2,205 | 73 | 14 | Chlorine, Chlorine Dioxide, HAA5 |
| Flagler | 2,160 | 16 | 2 | Selenium |
| Kersey | 2,101 | 8 | 0 | |
| Wiggins | 2,049 | 382 | 11 | Chlorine, Chlorine Dioxide, E. coli |
| Lasalle | 2,010 | 45 | 0 | |
| Westcliffe | 1,994 | 19 | 0 | |
| Creede | 1,965 | 21 | 0 | |
| El Jebel | 1,962 | 29 | 1 | Fecal Coliform |
| Edwards | 1,959 | 56 | 12 | TTHM |
| Conifer | 1,941 | 8 | 3 | E. coli |
| Wiley | 1,905 | 617 | 412 | HAA5, Total Organic Carbon |
| Oak Creek | 1,750 | 109 | 30 | E. coli, Fecal Coliform, Stage 2 DBP |
| Norwood | 1,700 | 20 | 0 | |
| Ouray | 1,660 | 156 | 3 | Chlorine, Fecal Coliform |
| Deer Trail | 1,648 | 9 | 0 | |
| Farmington Hills | 1,500 | 1 | 0 | |
| Crawford | 1,469 | 655 | 28 | Chlorine, Chlorine Dioxide, Disinfection Byproducts +2 more |
| Poncha Springs | 1,467 | 7 | 4 | Disinfection Byproducts |
| Del Norte | 1,429 | 31 | 2 | Chlorine |
| Springfield | 1,378 | 15 | 5 | Chlorine, Haloacetic Acids, Selenium |
| Ignacio | 1,351 | 51 | 5 | Chlorine, Fecal Coliform |
| Ridgway | 1,350 | 66 | 15 | Fecal Coliform |
| La Veta | 1,325 | 107 | 32 | Chlorine, Fecal Coliform, Total Haloacetic Acids (HAA5) |
| Parachute | 1,320 | 15 | 0 | |
| Calhan | 1,317 | 125 | 3 | Chlorine, Selenium |
| Indian Hills | 1,300 | 28 | 6 | E. coli, Fecal Coliform |
| San Luis | 1,275 | 240 | 5 | Chlorine, Disinfection Byproducts, Stage 2 DBP |
| Holly | 1,226 | 171 | 58 | Arsenic, Chlorine, Total Organic Carbon |
| Julesburg | 1,225 | 23 | 4 | HAA5 |
| Minturn | 1,200 | 9 | 1 | E. coli |
| Antonito | 1,171 | 163 | 10 | Chlorine, Chlorine Dioxide, Disinfection Byproducts +2 more |
| Fowler | 1,169 | 26 | 12 | Fecal Coliform, HAA5 |
| Fairplay | 1,159 | 45 | 3 | Fecal Coliform |
| South Fork | 1,152 | 250 | 3 | Chlorine, Chlorine Dioxide |
| Gilcrest | 1,150 | 6 | 1 | Disinfection Byproducts |
| Pierce | 1,094 | 4 | 0 | |
| Log Lane Village | 1,006 | 18 | 0 | |
| Byers | 1,000 | 2 | 0 | |
| Manassa | 976 | 49 | 0 | |
| Manzanola | 967 | 651 | 413 | Chlorine, Chlorine Dioxide, HAA5 +2 more |
| Haxtun | 963 | 92 | 0 | |
| Stratton | 960 | 71 | 5 | Chlorine, Chlorine Dioxide |
| Beulah | 927 | 187 | 81 | Chlorine, Chlorine Dioxide, Contaminant 2920 +5 more |
| Debeque | 911 | 79 | 3 | TTHM |
| Kiowa | 910 | 24 | 0 | |
| Hugo | 885 | 62 | 1 | Stage 2 DBP |
| Nucla | 875 | 203 | 17 | Chlorine, E. coli, Fecal Coliform +1 more |
| Sanford | 850 | 0 | 0 | |
| Dove Creek | 850 | 25 | 10 | E. coli, Fecal Coliform, Stage 2 DBP +1 more |
| Cheyenne Wells | 840 | 43 | 5 | Barium, Chlorine, Selenium |
| La Jara | 825 | 27 | 0 | |
| York | 789 | 125 | 0 | |
| Bailey | 783 | 49 | 2 | Chlorine |
| Williamsburg | 775 | 33 | 0 | |
| Rye | 745 | 184 | 100 | Chlorine, Chlorine Dioxide, Disinfection Byproducts +4 more |
| Ft Morgan | 705 | 138 | 47 | Chlorine, Chlorine Dioxide, Disinfection Byproducts +1 more |
| Hot Sulphur Springs | 687 | 19 | 0 | |
| Collbran | 678 | 4 | 0 | |
| Bloomfield Hills | 666 | 33 | 0 | |
| Swink | 660 | 5 | 2 | Chlorine |
| Eads | 656 | 5 | 0 | |
| Lake City | 654 | 15 | 1 | Fecal Coliform |
| Walden | 652 | 29 | 0 | |
| Walsh | 650 | 33 | 23 | Chlorine Dioxide, Selenium, Total Organic Carbon |
| San Francisco | 646 | 78 | 4 | Chlorine |
| Nathrop | 638 | 12 | 0 | |
| Simla | 618 | 7 | 0 | |
| Otis | 600 | 34 | 2 | Chlorine Dioxide |
| Naturita | 585 | 66 | 13 | TTHM |
| Moffat | 580 | 16 | 1 | Chlorine |
| Tabernash | 564 | 0 | 0 | |
| Woody Creek | 544 | 252 | 2 | Chlorine, Fecal Coliform |
| Sedalia | 525 | 47 | 2 | Chlorine Dioxide |
| Granada | 515 | 142 | 10 | Chlorine, Chlorine Dioxide, Stage 2 DBP |
| Clark | 511 | 198 | 1 | Chlorine |
| Rockvale | 504 | 31 | 2 | Disinfection Byproducts |
| Saguache | 504 | 42 | 0 | |
| Empire | 500 | 123 | 42 | Disinfection Byproducts, Fecal Coliform |
| Snowmass | 499 | 245 | 32 | Chlorine, E. coli, Fecal Coliform |
| Nunn | 499 | 3 | 0 | |
| Victor | 491 | 76 | 15 | Chlorine Dioxide, E. coli, Total Haloacetic Acids (HAA5) |
| Ft Garland | 477 | 43 | 0 | |
| Blanca | 469 | 10 | 0 | |
| Red Cliff | 469 | 16 | 3 | Fecal Coliform |
| Yampa | 467 | 33 | 10 | Chlorine, Fecal Coliform |
| Alma | 460 | 20 | 4 | Fecal Coliform |
| Florissant | 458 | 495 | 18 | Chlorine Dioxide, Disinfection Byproducts, Fecal Coliform +1 more |
| Aguilar | 447 | 36 | 3 | Chlorine Dioxide, Fecal Coliform |
| Fleming | 446 | 98 | 1 | Chlorine |
| Brookside | 438 | 12 | 0 | |
| Rico | 437 | 21 | 4 | Disinfection Byproducts, Fecal Coliform |
| Cimarron | 431 | 14 | 10 | Chlorine, Fecal Coliform, Total Haloacetic Acids (HAA5) |
| Allenspark | 416 | 105 | 3 | Chlorine Dioxide, Fecal Coliform |
| Cheraw | 408 | 357 | 214 | Chlorine, HAA5, Stage 2 DBP +1 more |
| Olney Springs | 399 | 14 | 2 | Chlorine, Disinfection Byproducts |
| Livermore | 395 | 65 | 0 | |
| Los Altos | 379 | 29 | 9 | Selenium |
| Mcclave | 378 | 56 | 12 | Total Organic Carbon |
| Gateway | 370 | 6 | 0 | |
| Romeo | 365 | 129 | 3 | Chlorine |
| Henderson | 351 | 7 | 0 | |
| Coal Creek | 350 | 6 | 0 | |
| Dinosaur | 350 | 156 | 3 | Disinfection Byproducts |
| Mesa | 330 | 16 | 0 | |
| Iliff | 328 | 8 | 0 | |
| Placierville | 322 | 18 | 2 | Chlorine |
| Briggsdale | 303 | 4 | 0 | |
| Elbert | 300 | 21 | 0 | |
| Seibert | 296 | 25 | 1 | Disinfection Byproducts |
| Peetz | 295 | 54 | 26 | Barium, Chlorine Dioxide |
| Jamestown | 280 | 96 | 11 | Disinfection Byproducts, E. coli, Fecal Coliform |
| Redstone | 275 | 30 | 1 | E. coli |
| Boone | 263 | 54 | 6 | Fecal Coliform, Selenium |
| Ovid | 259 | 13 | 1 | Barium |
| Wolcott | 257 | 0 | 0 | |
| Capulin | 250 | 49 | 2 | Chlorine |
| Hasty | 244 | 54 | 36 | Disinfection Byproducts, HAA5, Total Organic Carbon |
| Sugar City | 240 | 11 | 0 | |
| Weldona | 235 | 44 | 20 | Disinfection Byproducts, Haloacetic Acids, TTHM |
| Eckley | 235 | 191 | 11 | Barium, Chlorine Dioxide |
| Ward | 230 | 8 | 0 | |
| Irvine | 229 | 9 | 1 | Gross Alpha |
| Sedgwick | 227 | 12 | 2 | Disinfection Byproducts |
| Las Vegas | 213 | 7 | 2 | Chlorine |
| Eastlake | 200 | 2 | 0 | |
| Paradox | 200 | 127 | 42 | Chlorine, Chlorine Dioxide, E. coli +1 more |
| Northbrook | 200 | 410 | 4 | Chlorine, Gross Alpha |
| Santa Ana | 200 | 14 | 1 | Stage 2 DBP |
| Bethune | 195 | 14 | 0 | |
| Ophir | 193 | 102 | 36 | Chlorine Dioxide, Fecal Coliform |
| Crook | 182 | 8 | 0 | |
| Silver Plume | 180 | 23 | 10 | Disinfection Byproducts, Fecal Coliform |
| Tempe | 175 | 3 | 1 | Stage 2 DBP |
| Buffalo Creek | 175 | 24 | 10 | Disinfection Byproducts, E. coli, Selenium |
| Westcreek | 165 | 63 | 10 | Fecal Coliform, Lead |
| Vona | 160 | 61 | 2 | Gross Alpha, Stage 2 DBP |
| Hesperus | 154 | 12 | 0 | |
| Genoa | 153 | 197 | 19 | Chlorine, E. coli, Fecal Coliform +1 more |
| Agate | 152 | 182 | 9 | Chlorine Dioxide |
| Bristol | 151 | 246 | 16 | Chlorine, E. coli, Total Organic Carbon |
| Campo | 150 | 23 | 2 | Disinfection Byproducts |
| Stockton | 150 | 141 | 1 | Chlorine |
| Sheridan Lake | 148 | 293 | 35 | Chlorine Dioxide, Gross Alpha, Haloacetic Acids +1 more |
| Vilas | 137 | 42 | 13 | Chlorine, Total Organic Carbon |
| Branson | 131 | 86 | 3 | Chlorine, Fecal Coliform |
| Pritchett | 125 | 32 | 27 | Total Organic Carbon |
| Ramah | 125 | 53 | 5 | Chlorine Dioxide |
| Cokedale | 120 | 38 | 1 | Chlorine |
| Kim | 116 | 6 | 1 | Chlorine |
| Almont | 113 | 33 | 1 | Fecal Coliform |
| Detroit Lakes | 107 | 3 | 0 | |
| Karval | 102 | 20 | 3 | Chlorine, Selenium |
| Garcia | 100 | 9 | 2 | Chlorine, Stage 2 DBP |
| Prairie Village | 100 | 10 | 2 | Chlorine |
| Somerset | 100 | 59 | 26 | Fecal Coliform, TTHM |
Data Sources
Drinking water data from the EPA Safe Drinking Water Information System (SDWIS). Only active community water systems (CWS) serving 100+ people are included.