waterbycounty

Tennessee Water Quality

Drinking water data for all 95 counties.

Avg Water Score

71.3

State Grade

C

Counties with Data

95

of 95 total

All Tennessee Counties

CountyWater Score
Anderson County86.0
Benton County86.0
Bradley County86.0
Campbell County86.0
Cannon County86.0
Carroll County86.0
Cheatham County86.0
Chester County86.0
Claiborne County86.0
Cocke County86.0
Coffee County86.0
Crockett County86.0
Cumberland County86.0
Davidson County86.0
Decatur County86.0
Dickson County86.0
Dyer County86.0
Fayette County86.0
Franklin County86.0
Gibson County86.0
Grainger County86.0
Hamblen County86.0
Hancock County86.0
Hardeman County86.0
Haywood County86.0
Henderson County86.0
Henry County86.0
Hickman County86.0
Houston County86.0
Humphreys County86.0
Jefferson County86.0
Johnson County86.0
Knox County86.0
Lake County86.0
Lauderdale County86.0
Lawrence County86.0
Lewis County86.0
Lincoln County86.0
Loudon County86.0
Macon County86.0
Madison County86.0
Marion County86.0
Marshall County86.0
Maury County86.0
McMinn County86.0
McNairy County86.0
Meigs County86.0
Moore County86.0
Morgan County86.0
Obion County86.0
Overton County86.0
Perry County86.0
Polk County86.0
Putnam County86.0
Scott County86.0
Sequatchie County86.0
Sevier County86.0
Shelby County86.0
Sullivan County86.0
Sumner County86.0
Unicoi County86.0
Weakley County86.0
White County86.0
Hamilton County71.8
Blount County70.8
Rutherford County70.1
Tipton County69.0
Washington County66.2
Hardin County65.3
Greene County64.8
Carter County62.0
Williamson County62.0
Warren County60.8
Wilson County57.2
Montgomery County55.1
Robertson County53.4
Union County50.5
Monroe County49.4
Roane County46.5
Bledsoe County42.5
Giles County42.3
Bedford County37.5
Rhea County35.1
DeKalb County32.0
Hawkins County31.9
Fentress County29.2
Clay County25.0
Pickett County20.2
Smith County18.9
Stewart County17.4
Grundy County17.0
Trousdale County15.5
Wayne County8.2
Jackson County7.7
Van Buren County3.5

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Frequently Asked Questions

Which county in Tennessee has the best water quality?
Anderson County has the highest water quality score in Tennessee at 86.0/100 (Grade: A), based on EPA SDWIS data.
Which county in Tennessee has the most water violations?
Van Buren County has among the lowest water quality scores in Tennessee at 3.5/100. See the individual county page for detailed violation history.
Is the tap water safe to drink in Tennessee?
Tennessee has an average water quality score of 71.3/100 based on EPA Safe Drinking Water Act compliance data. Individual county scores vary — check your specific county's page for detailed information.
What contaminants are found in Tennessee water supplies?
Drinking water quality varies by county and water system. The EPA Safe Drinking Water Information System (SDWIS) tracks violations for contaminants like lead, nitrates, bacteria, and disinfection byproducts. See individual county pages for specific contaminant and violation history.

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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