waterbycounty

Missouri Water Quality

Drinking water data for all 115 counties.

Avg Water Score

99.6

State Grade

A

Counties with Data

115

of 115 total

All Missouri Counties

CountyWater Score
Atchison County100.0
Barton County100.0
Bollinger County100.0
Boone County100.0
Buchanan County100.0
Callaway County100.0
Cape Girardeau County100.0
Carter County100.0
Christian County100.0
Clark County100.0
Clinton County100.0
Cole County100.0
Cooper County100.0
Crawford County100.0
Dallas County100.0
Dent County100.0
Douglas County100.0
Greene County100.0
Grundy County100.0
Jackson County100.0
Jasper County100.0
Johnson County100.0
Knox County100.0
Laclede County100.0
Linn County100.0
Livingston County100.0
Macon County100.0
Madison County100.0
Maries County100.0
Marion County100.0
Platte County100.0
Polk County100.0
Pulaski County100.0
Randolph County100.0
Ray County100.0
Schuyler County100.0
Shannon County100.0
St. Charles County100.0
St. Louis city100.0
St. Louis County100.0
Worth County100.0
Wright County100.0
Adair County99.9
Audrain County99.9
Barry County99.9
Butler County99.9
Camden County99.9
Daviess County99.9
Howell County99.9
Jefferson County99.9
Lafayette County99.9
Moniteau County99.9
Montgomery County99.9
Newton County99.9
Oregon County99.9
Osage County99.9
Perry County99.9
Phelps County99.9
Ripley County99.9
Saline County99.9
St. Clair County99.9
Taney County99.9
Vernon County99.9
Warren County99.9
Benton County99.8
Carroll County99.8
Cass County99.8
Clay County99.8
Dade County99.8
Dunklin County99.8
Franklin County99.8
Gasconade County99.8
Howard County99.8
Lewis County99.8
McDonald County99.8
Stone County99.8
Webster County99.8
Andrew County99.7
Nodaway County99.7
Putnam County99.7
Reynolds County99.7
Stoddard County99.7
Washington County99.7
Henry County99.6
Lawrence County99.6
Miller County99.6
Pemiscot County99.6
Pettis County99.6
Sullivan County99.6
Texas County99.6
Harrison County99.5
Scott County99.5
Wayne County99.5
Cedar County99.4
Chariton County99.4
New Madrid County99.4
Ralls County99.4
Ste. Genevieve County99.4
Hickory County99.3
Holt County99.3
Mississippi County99.3
Pike County99.2
St. Francois County99.2
Shelby County99.0
Lincoln County98.7
Ozark County98.7
Caldwell County98.6
DeKalb County98.5
Bates County98.4
Morgan County98.3
Scotland County98.1
Gentry County97.7
Iron County97.0
Monroe County96.0
Mercer County95.7

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Data Source

Water quality data sourced from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

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