waterbycounty

Texas Water Quality

Drinking water data for all 254 counties.

Avg Water Score

30.4

State Grade

F

Counties with Data

254

of 254 total

All Texas Counties

CountyWater Score
Baylor County86.0
Crockett County86.0
Dickens County86.0
Franklin County86.0
Glasscock County86.0
Hemphill County86.0
Kinney County86.0
Lavaca County86.0
Reagan County86.0
Roberts County86.0
Schleicher County86.0
Sterling County86.0
Titus County86.0
Dallas County71.8
Potter County71.1
Collin County70.8
Fort Bend County67.8
Bexar County67.5
Denton County66.8
Rockwall County66.8
Williamson County66.5
Harris County65.8
Tarrant County64.6
Bell County64.5
Ellis County64.2
Hidalgo County64.2
Brown County63.8
Gonzales County63.8
Hays County62.2
Wilson County62.0
Maverick County61.7
Travis County61.7
Bowie County61.5
DeWitt County61.2
El Paso County60.6
Guadalupe County60.1
Robertson County59.6
Wichita County59.6
Galveston County59.1
Upshur County58.5
Kaufman County57.5
Atascosa County56.9
Donley County56.8
Ward County56.8
Wood County56.8
Zavala County56.6
Fannin County56.1
Johnson County56.1
Gray County55.6
Nueces County55.5
Moore County55.2
Archer County55.0
Live Oak County53.4
Deaf Smith County53.1
Nacogdoches County52.5
Brazos County52.2
San Saba County51.2
Hopkins County50.5
Cameron County49.6
Medina County49.4
Morris County49.3
Hardin County49.0
Young County48.4
Wharton County48.3
Bailey County47.9
Lamar County47.3
Floyd County46.4
Colorado County45.9
Hansford County45.9
Montgomery County45.7
Lee County45.6
Ochiltree County45.5
Hunt County45.3
Mitchell County45.0
Jackson County44.8
Taylor County44.4
Bastrop County44.0
Liberty County43.9
Cooke County43.5
Winkler County43.3
Camp County43.2
Freestone County43.2
Anderson County41.5
Gregg County40.6
Crane County40.4
Waller County40.1
Leon County39.8
Frio County39.0
Van Zandt County38.9
Swisher County38.7
Hutchinson County38.4
Sutton County38.4
Parmer County38.1
Stephens County37.9
Hill County37.8
Newton County37.8
Austin County37.3
La Salle County36.8
Nolan County36.7
Dimmit County36.5
Goliad County36.2
Sherman County36.1
Hudspeth County35.0
Montague County34.9
Webb County34.9
Culberson County34.7
Carson County34.5
Coleman County34.4
Tom Green County32.3
Ector County32.0
Oldham County31.8
Grayson County31.4
Jeff Davis County31.3
Jefferson County30.8
Uvalde County30.5
Menard County29.9
Willacy County29.8
Armstrong County29.7
Karnes County28.4
Hood County28.3
Tyler County26.2
Red River County26.0
Madison County25.7
Coryell County25.3
Navarro County25.1
Llano County24.7
Smith County24.7
Bandera County24.3
Comal County23.6
San Patricio County23.6
Randall County23.0
Val Verde County22.5
Childress County22.3
Irion County22.3
Starr County22.0
Jack County21.9
Bosque County21.8
Brazoria County21.2
Scurry County21.2
Walker County21.0
Terrell County20.6
Henderson County20.4
Hale County19.5
McLennan County19.2
Caldwell County18.7
Cochran County18.5
Victoria County18.5
Brooks County18.3
Hartley County17.7
Kleberg County17.7
Lipscomb County17.6
Aransas County17.3
Crosby County17.2
Lamb County16.8
Cottle County16.6
Parker County16.5
Reeves County16.4
Milam County16.0
Rusk County15.5
Delta County15.3
Midland County15.2
Erath County14.7
Washington County14.7
Wheeler County13.9
Harrison County13.7
Howard County13.6
Lampasas County13.4
Clay County13.3
Brewster County13.1
Wise County12.7
Collingsworth County12.6
Jim Wells County12.6
Rains County11.9
Mills County11.4
Kendall County11.3
Houston County11.2
Angelina County11.0
Bee County10.9
Jones County10.7
Burleson County10.6
Blanco County10.2
Cass County10.2
McMullen County10.1
Zapata County10.1
Dallam County9.7
Pecos County9.6
Upton County9.3
Jasper County9.2
Fayette County9.1
Chambers County9.0
Gillespie County9.0
Kenedy County8.7
Palo Pinto County8.5
Andrews County8.2
Somervell County8.1
Castro County8.0
Kerr County7.8
Lubbock County7.8
Motley County7.6
Orange County7.6
San Jacinto County7.1
Sabine County6.9
Grimes County6.7
Cherokee County6.6
Eastland County6.5
Limestone County6.5
Calhoun County6.4
Refugio County6.4
Loving County6.0
Marion County5.9
Falls County5.8
Hamilton County5.8
Haskell County5.6
Polk County5.6
Shackelford County5.4
Garza County5.3
Matagorda County5.1
Dawson County4.9
Jim Hogg County4.8
Panola County4.8
Wilbarger County4.7
Kimble County4.6
Shelby County4.6
Presidio County4.5
Fisher County4.4
Terry County4.4
Trinity County4.0
Hardeman County3.8
Runnels County3.4
Callahan County3.2
Comanche County3.2
Yoakum County2.9
Hockley County2.7
Gaines County2.6
Martin County2.6
Knox County2.5
Burnet County2.4
Duval County2.4
Mason County2.1
Coke County1.9
Real County1.8
Throckmorton County1.6
Kent County1.4
Stonewall County1.3
Hall County0.8
Concho County0.7
King County0.5
Lynn County0.4
San Augustine County0.2
Briscoe County0.1
Edwards County0.1
McCulloch County0.1
Borden County0.0
Foard County0.0

Concerned about your water quality?

Berkey water filters remove contaminants at home.

Shop Filters →

Sponsored

Frequently Asked Questions

Which county in Texas has the best water quality?
Baylor County has the highest water quality score in Texas at 86.0/100 (Grade: A), based on EPA SDWIS data.
Which county in Texas has the most water violations?
Foard County has among the lowest water quality scores in Texas at 0.0/100. See the individual county page for detailed violation history.
Is the tap water safe to drink in Texas?
Texas has an average water quality score of 30.4/100 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 Texas 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.

← Back to All States

Explore more data for Texas

Property TaxCost of LivingCrime RateIncomeHealthSchoolsDisaster RiskWeatherCounty Score