TTHM (Total Trihalomethanes) violations in Texas
514 active public water systems in Texas had a TTHM (Total Trihalomethanes) violation in the past three years, 157 of them in the latest quarter of EPA's data. What TTHM (Total Trihalomethanes) is and why it matters.
Systems with a TTHM (Total Trihalomethanes) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
City of Tatum Rusk County |
1,902 | 6 | 1 | |
|
Matagorda WSC Matagorda County |
1,746 | 4 | 1 | |
|
City of Goldthwaite Mills County |
1,738 | 3 | 1 | |
|
Gafford Chapel WSC Hopkins County |
1,680 | 3 | 2 | |
|
City of Danbury Brazoria County |
1,673 | 4 | 0 | |
|
City of Baird Callahan County |
1,534 | 8 | 2 | |
|
Coles Crossing Chambers County |
1,521 | 6 | 3 | |
|
City of Kerens Navarro County |
1,520 | 3 | 0 | |
|
City of Gorman Eastland County |
1,518 | 5 | 1 | |
|
Inv Nylon Chemicals Americas Victoria SI Victoria County |
1,500 | 1 | 0 | |
|
City of Trinidad Henderson County |
1,482 | 5 | 1 | |
|
Kaufman County MUD 9 Kaufman County |
1,473 | 2 | 0 | |
|
Glendale WSC Trinity County |
1,458 | 10 | 4 | |
|
Harris County MUD 261 Harris County |
1,452 | 1 | 0 | |
|
San Augustine Rural WSC San Augustine County |
1,450 | 2 | 0 | |
|
Rivercrest WS Travis County |
1,437 | 2 | 1 | |
|
City of Bevil Oaks Jefferson County |
1,414 | 4 | 0 | |
|
Beaver Creek Wcid 1 Burleson County |
1,407 | 2 | 0 | |
|
Federal Correctional Institution la Tuna El Paso County |
1,400 | 7 | 3 | |
|
Concho Rural Water Pecan Creek Tom Green County |
1,275 | 2 | 1 | |
|
Hardin County Wcid 1 Hardin County |
1,256 | 3 | 0 | |
|
Zapata County San Ygnacio and Ramireno Zapata County |
1,254 | 6 | 1 | |
|
City of Rogers Bell County |
1,200 | 4 | 1 | |
|
Harris County MUD 255 Harris County |
1,185 | 4 | 1 | |
|
Western Pines MHP Harris County |
1,170 | 2 | 0 | |
|
City of Beckville Panola County |
1,152 | 3 | 0 | |
|
Liberty Danville Fwsd 2 Gregg County |
1,131 | 4 | 0 | |
|
Three Community WSC Henderson County |
1,128 | 6 | 1 | |
|
The Cliffs Palo Pinto County |
1,115 | 5 | 1 | |
|
Starrville WSC Smith County |
1,077 | 2 | 1 | |
|
City of Jamaica Beach Galveston County |
1,075 | 4 | 2 | |
|
Rock Hill WSC Panola County |
1,062 | 2 | 0 | |
|
Cottage Gardens Harris County |
1,047 | 4 | 1 | |
|
Grandpappy Point Marina Grayson County |
1,027 | 4 | 0 | |
|
City of Robert Lee Coke County |
1,025 | 5 | 0 | |
|
Barton Creek Lakeside Travis County |
1,023 | 2 | 0 | |
|
Stryker Lake WSC Cherokee County |
1,002 | 2 | 1 | |
|
Murvaul WSC Panola County |
999 | 4 | 0 | |
|
Methodist Specialty Hospital Bexar County |
983 | 4 | 1 | |
|
City of Thrall Williamson County |
975 | 1 | 0 | |
|
Treasure Island MUD Brazoria County |
951 | 4 | 0 | |
|
Alabama Coushatta #2 (westside) County |
950 | 1 | 0 | |
|
Red Creek MUD Tom Green County |
945 | 3 | 0 | |
|
Katy Hockley Regional Water Plant Harris County |
936 | 2 | 0 | |
|
Nueces County Wcid 5 Nueces County |
933 | 5 | 1 | |
|
Paxton WSC Shelby County |
908 | 7 | 0 | |
|
City of Centerville Leon County |
903 | 4 | 0 | |
|
East Lamar WSC Shelby County |
900 | 4 | 0 | |
|
Flint Hills Resources West Nueces County |
900 | 3 | 0 | |
|
Hhsc San Angelo State Supported Living C Tom Green County |
900 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved TTHM (Total Trihalomethanes), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not TTHM (Total Trihalomethanes) alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Texas records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.