Missouri Drinking Water Violations

2,998Water Systems
54,859Total Violations
6,995Health-Based

Missouri has 2,998 active public water systems regulated under the EPA's Safe Drinking Water Act. Across these systems, there have been 6,995 health-based violations out of 54,859 total violations recorded. Currently, 48 water systems have unresolved health-based violations.

The most frequently cited health-based contaminants in Missouri are Unknown, Unknown, and Unknown. Health-based violations mean a water system exceeded an EPA maximum contaminant level (MCL) or failed required treatment standards.

Browse the counties below to find specific water systems, or search by address or ZIP code to find your water provider.

Counties

CountyWater SystemsTotal ViolationsHealth-Based
St. Francois County 14 341 163
Lincoln County 8 348 154
Mcdonald County 9 377 128
Dekalb County 5 146 125
Saline County 11 273 123
Clay County 18 285 115
Cass County 24 287 112
Monroe County 3 149 88
Madison County 4 72 63
Cooper County 8 125 60
Bates County 7 284 58
Pike County 6 125 54
Taney County 29 463 45
Ozark County 8 152 45
Scott County 11 543 42
Iron County 11 291 42
Howard County 5 73 41
Andrew County 8 98 40
Gentry County 4 66 39
Butler County 8 170 36
Henry County 9 85 36
New Madrid County 13 525 33
Lafayette County 11 91 32
Washington County 6 103 31
Caldwell County 6 109 26
Audrain County 6 67 26
Ripley County 5 39 25
Jasper County 20 336 24
Stoddard County 17 216 24
Stone County 49 651 23
Nodaway County 10 114 23
Mississippi County 5 255 22
Pulaski County 12 128 22
Scotland County 2 91 21
Douglas County 4 65 21
Putnam County 3 47 21
Lawrence County 15 341 20
Grundy County 5 58 20
Mercer County 2 38 20
Newton County 22 331 19
Perry County 8 192 19
Platte County 17 149 19
Laclede County 6 36 19
Barton County 3 35 19
Marion County 3 34 19
Bollinger County 4 30 19
Webster County 10 191 18
Shelby County 5 35 18
Camden County 35 362 17
Adair County 4 37 17
Dunklin County 10 457 16
Pemiscot County 5 119 16
Greene County 31 352 15
Texas County 11 89 15
St. Clair County 5 41 14
Jefferson County 12 62 13
Chariton County 5 47 13
Lewis County 5 40 13
Barry County 32 180 12
Cape Girardeau County 13 179 12
Cedar County 14 100 12
Daviess County 8 59 12
Phelps County 12 316 11
Miller County 14 164 11
Polk County 12 137 11
Crawford County 8 78 11
Holt County 6 50 11
Hickory County 18 293 10
St. Charles County 11 40 10
Randolph County 6 31 10
Dent County 5 22 10
Christian County 17 193 8
Carroll County 6 63 8
Sullivan County 6 44 8
Howell County 9 36 8
Benton County 22 220 7
Jackson County 15 74 7
Ray County 7 52 7
Wayne County 12 310 6
Linn County 9 71 6
Harrison County 6 49 6
Morgan County 5 47 6
Franklin County 8 43 6
Vernon County 8 43 6
Worth County 3 32 6
Montgomery County 10 84 5
Ste. Genevieve County 8 68 5
Osage County 10 278 4
Schuyler County 4 38 4
Reynolds County 15 298 3
Gasconade County 8 116 3
Pettis County 13 81 3
Cole County 11 128 2
Oregon County 6 96 2
Boone County 11 62 2
Dade County 9 54 2
Dallas County 6 38 2
Livingston County 7 31 2
Moniteau County 6 31 2
Clinton County 7 17 2
Maries County 2 17 2
Johnson County 10 53 1
Ralls County 3 7 1
Wright County 7 122 0
Carter County 6 89 0
Macon County 7 65 0
Knox County 2 53 0
St. Louis City County 1 48 0
Clark County 4 41 0
Callaway County 9 37 0
Warren County 8 26 0
Shannon County 10 11 0
Buchanan County 3 8 0
Atchison County 5 7 0
St. Louis County 1 0 0