Interim Enhanced Surface Water Treatment Rule violations in Texas
90 active public water systems in Texas had a Interim Enhanced Surface Water Treatment Rule violation in the past three years, 3 of them in the latest quarter of EPA's data. What Interim Enhanced Surface Water Treatment Rule is and why it matters.
Systems with a Interim Enhanced Surface Water Treatment Rule violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Woodcreek Utility 2 Hays County |
3,096 | 5 | 1 | |
|
Radiance WSC Hays County |
120 | 6 | 1 | |
|
New Horizons Ranch & Center Mills County |
100 | 4 | 1 | |
|
City of Houston Harris County |
2,970,543 | 1 | 0 | |
|
City of Laredo Webb County |
260,046 | 4 | 0 | |
|
City of Midland Water Purification Plant Midland County |
157,000 | 3 | 1 | |
|
City of Odessa Ector County |
123,334 | 4 | 1 | |
|
City of Port Arthur Jefferson County |
56,039 | 2 | 0 | |
|
City of Grapevine Tarrant County |
52,346 | 1 | 0 | |
|
Clwsc Canyon Lake Shores Comal County |
44,196 | 6 | 0 | |
|
West Travis County Public Utility Agency Travis County |
35,664 | 3 | 0 | |
|
City of Palestine Anderson County |
31,272 | 4 | 0 | |
|
City of Big Spring Howard County |
27,282 | 4 | 0 | |
|
City of Marshall Harrison County |
23,091 | 7 | 3 | |
|
City of Roma Starr County |
19,464 | 8 | 1 | |
|
City of Rio Grande City Starr County |
18,912 | 3 | 2 | |
|
City of Nederland Jefferson County |
18,157 | 3 | 1 | |
|
Pecan Grove MUD Fort Bend County |
14,913 | 2 | 1 | |
|
East Cedar Creek Fwsd Brookshire Henderson County |
14,823 | 5 | 0 | |
|
City of la Grulla Starr County |
11,250 | 7 | 6 | |
|
City of Snyder Scurry County |
11,104 | 1 | 0 | |
|
West Jefferson County Mwd Jefferson County |
9,367 | 2 | 0 | |
|
City of Lago Vista Travis County |
8,698 | 5 | 1 | |
|
Possum Kingdom WSC Palo Pinto County |
8,583 | 3 | 1 | |
|
Hidalgo County MUD 1 Hidalgo County |
8,420 | 3 | 1 | |
|
City of Marble Falls Burnet County |
8,059 | 2 | 0 | |
|
Jonestown WSC Travis County |
7,902 | 4 | 1 | |
|
Rio WSC Starr County |
6,939 | 4 | 1 | |
|
City of White Oak Gregg County |
6,469 | 3 | 0 | |
|
City of Gladewater Gregg County |
6,441 | 7 | 2 | |
|
Union WSC Starr County |
5,793 | 5 | 1 | |
|
Oak Trail Shores Hood County |
5,676 | 3 | 0 | |
|
Crosby MUD Harris County |
5,130 | 3 | 0 | |
|
City of Canton Van Zandt County |
5,028 | 4 | 1 | |
|
City of Mathis San Patricio County |
5,001 | 6 | 0 | |
|
City of Three Rivers Live Oak County |
4,428 | 6 | 0 | |
|
Tpwd Palo Duro Canyon State Park Randall County |
3,964 | 5 | 1 | |
|
Emma Long Metro Park Travis County |
3,840 | 2 | 0 | |
|
City of Clyde Callahan County |
3,820 | 5 | 1 | |
|
City of Blanco Blanco County |
3,192 | 4 | 2 | |
|
Martindale WSC Caldwell County |
3,045 | 2 | 0 | |
|
City of Malakoff Henderson County |
3,039 | 2 | 0 | |
|
City of la Joya Hidalgo County |
3,033 | 7 | 5 | |
|
Travis County Wcid Point Venture Travis County |
2,835 | 3 | 1 | |
|
City of Rio Hondo Cameron County |
2,640 | 6 | 3 | |
|
City of Runaway Bay Wise County |
2,458 | 9 | 1 | |
|
City of Winters Runnels County |
2,281 | 6 | 2 | |
|
City of West Tawakoni Hunt County |
2,061 | 8 | 5 | |
|
Sebastian MUD Willacy County |
1,884 | 5 | 2 | |
|
City of Leakey Real County |
1,758 | 3 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Interim Enhanced Surface Water Treatment Rule, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Interim Enhanced Surface Water Treatment Rule 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.