Cyanide violations in Texas
104 active public water systems in Texas had a Cyanide violation in the past three years. What Cyanide is and why it matters.
Health effects: Acute high-dose cyanide exposure interferes with cellular oxygen use and can cause rapid deterioration of the central nervous system, including headache, dizziness, and in severe cases, loss of consciousness. Chronic exposure at lower levels is associated with thyroid dysfunction and nerve damage. Most drinking water violations pose chronic rather than acute risk.
Systems with a Cyanide violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Anadarko Carrizo Springs Facility Dimmit County |
238 | 5 | 0 | |
|
Warren Road Subdivision Water Supply Midland County |
195 | 13 | 6 | |
|
Hidden Valley Water System Denton County |
186 | 4 | 0 | |
|
Rolling Hills Water Supply McLennan County |
186 | 12 | 3 | |
|
Universal Forest Products Walker County |
180 | 3 | 0 | |
|
South Midland County Water System Midland County |
165 | 10 | 4 | |
|
Thomas Acres Johnson County |
165 | 7 | 1 | |
|
Woodland Estates Bowie County |
165 | 12 | 5 | |
|
Denton Estates Mobile Home Park Denton County |
156 | 12 | 5 | |
|
Sunset Acres Subdivision Hood County |
156 | 2 | 0 | |
|
Whispering Oaks Water Coop Hunt County |
141 | 10 | 0 | |
|
Cattail Creek MHP Erath County |
135 | 7 | 1 | |
|
Lakeside Water Supply 5 Tyler County |
135 | 9 | 4 | |
|
Lakeside Water Supply 1 Tyler County |
132 | 7 | 3 | |
|
Harris County Leadership Academy Harris County |
125 | 6 | 1 | |
|
Hamilton Estates Water System Harris County |
123 | 12 | 5 | |
|
Pleasure Point Angelina County |
110 | 12 | 3 | |
|
Cabot Pampa Plant Gray County |
100 | 4 | 0 | |
|
Computer Kids Preschool Harris County |
100 | 9 | 0 | |
|
Little Lions Learning Academy Bexar County |
100 | 12 | 4 | |
|
Oak River Ranch Somervell County |
99 | 5 | 0 | |
|
Nico Tyme Water Coop Bexar County |
96 | 10 | 5 | |
|
Reed Estates Water System Harris County |
96 | 8 | 2 | |
|
Caddo Mesa WSC Hunt County |
93 | 9 | 4 | |
|
Gurudwara Sahib of Houston Harris County |
90 | 8 | 1 | |
|
Highland Court Parker County |
90 | 9 | 2 | |
|
Shady Oaks MHP Brazoria County |
90 | 6 | 1 | |
|
Vista Utilities Chambers County |
90 | 7 | 1 | |
|
Lakeside Water Supply 2 Tyler County |
84 | 9 | 4 | |
|
Oak Hill Acres Mobile Home Subdivision Bexar County |
81 | 11 | 4 | |
|
Woodland Shores Subdivision Shelby County |
75 | 13 | 3 | |
|
Dcp Midstream Goldsmith Plant Ector County |
70 | 3 | 1 | |
|
Valley Estates Lubbock County |
68 | 13 | 5 | |
|
Green Lake Estates Water Supply Limestone County |
66 | 11 | 2 | |
|
Carol Norra Mobile Home Park Harris County |
63 | 10 | 4 | |
|
Robin Cove Water Subdivision Brazoria County |
62 | 10 | 2 | |
|
Shelby Water Shelby County |
61 | 14 | 4 | |
|
Houston Suburban Heights MHP Harris County |
60 | 14 | 5 | |
|
Southford Mobile Home Park Harrison County |
57 | 9 | 2 | |
|
Country View MHP Lubbock County |
54 | 11 | 4 | |
|
Silver Hills Park Kerr County |
54 | 7 | 2 | |
|
Waring Knoll Subdivision Kendall County |
54 | 11 | 2 | |
|
Whispering Woods Burleson County |
51 | 5 | 1 | |
|
Sunnyvale RV Park Wise County |
48 | 9 | 2 | |
|
Fort Bend County MUD 246 Fort Bend County |
45 | 3 | 0 | |
|
McElroy Ranch Water System Brewster County |
45 | 10 | 0 | |
|
Quail Run Mobile Home Park El Paso County |
45 | 7 | 0 | |
|
Ridglea Industrial Center Tarrant County |
45 | 9 | 3 | |
|
Lee Limas Mobile Home Park El Paso County |
39 | 13 | 4 | |
|
Old Dominion Tyler Terminal Smith County |
37 | 5 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Cyanide, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Cyanide 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.