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 |
|---|---|---|---|---|
|
Demi John Place Water System Brazoria County |
336 | 3 | 0 | |
|
Clearwater Distribution Harrison County |
330 | 6 | 3 | |
|
George H Obrien JR VA Medical Center Howard County |
325 | 7 | 2 | |
|
Trinity Rural WSC 2 Trinity County |
322 | 4 | 0 | |
|
EJ Water Gregg County |
312 | 4 | 1 | |
|
Powell Point Water System San Augustine County |
307 | 4 | 1 | |
|
Heights Water Smith County |
306 | 5 | 1 | |
|
Ericksdahl WSC Jones County |
275 | 5 | 1 | |
|
Hedley Municipal Water System Donley County |
275 | 2 | 0 | |
|
Rra Northeast Quanah Water System Hardeman County |
275 | 1 | 0 | |
|
Trinity Presbyterian Church Kendall County |
270 | 6 | 0 | |
|
EL Camino Bay Water System Sabine County |
266 | 5 | 4 | |
|
City of Lueders Jones County |
259 | 4 | 1 | |
|
Maritime Admin Beaumont Layberth Facil Orange County |
240 | 2 | 2 | |
|
Bayridge Subdivision Water System Chambers County |
234 | 2 | 0 | |
|
Town of Quintana Brazoria County |
231 | 5 | 3 | |
|
Rra Greenbelt Lake Lots Donley County |
222 | 1 | 0 | |
|
Rra Foard County Water System Foard County |
215 | 2 | 0 | |
|
Shan D Water Supply Rusk County |
201 | 7 | 1 | |
|
Rra Carey Northfield WS Childress County |
183 | 2 | 0 | |
|
The Reserve Smith County |
177 | 5 | 3 | |
|
Whispering Pines Golf Club Trinity County |
160 | 2 | 1 | |
|
Indian Springs Subdivision Travis County |
159 | 3 | 1 | |
|
EL Pinon Estates Water System San Augustine County |
156 | 5 | 0 | |
|
Rra Farmers Valley Water System Wilbarger County |
156 | 4 | 0 | |
|
Smetana Forest Brazos County |
150 | 2 | 0 | |
|
Rra Medicine Mound Water System Hardeman County |
135 | 2 | 0 | |
|
Snug Harbor Subdivision Brazoria County |
135 | 2 | 0 | |
|
Rra Garden Valley WS Childress County |
125 | 1 | 0 | |
|
Rra Southwest Quanah Water System Hardeman County |
123 | 1 | 0 | |
|
Sunset Bay Aransas County |
123 | 3 | 2 | |
|
Rra Kirkland Lazare Childress County |
119 | 1 | 0 | |
|
Flag Creek Ranch Llano County |
117 | 6 | 0 | |
|
Anthony Harbor Subdivision San Augustine County |
108 | 2 | 0 | |
|
Hideaway Bay Lake Shores WSC Wise County |
108 | 1 | 0 | |
|
Rra Goodlett Water System Hardeman County |
105 | 1 | 0 | |
|
River Bend Water Services Matagorda County |
100 | 2 | 0 | |
|
Timberlane Water System Sabine County |
100 | 3 | 0 | |
|
Rra Club Lake Water System Hall County |
78 | 1 | 0 | |
|
Rra New Goodlett Water System Hardeman County |
78 | 2 | 0 | |
|
Rra Saied WS Childress County |
68 | 2 | 0 | |
|
LA Playa Subdivision Water System San Augustine County |
65 | 5 | 0 | |
|
Sun N Fun Water Supply Angelina County |
65 | 6 | 3 | |
|
Lakeview WSC Hall County |
60 | 7 | 4 | |
|
Rra Newlin Water System Hall County |
60 | 1 | 0 | |
|
Grassland WSC Lynn County |
55 | 11 | 4 | |
|
Seabrook Seafood Galveston County |
55 | 5 | 3 | |
|
Tri Try Water Stonewall County |
53 | 2 | 0 | |
|
Swenson WSC Stonewall County |
49 | 5 | 1 | |
|
Lakewood Water System San Augustine County |
48 | 3 | 2 |
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.