Simazine violations in Texas
115 active public water systems in Texas had a Simazine violation in the past three years. What Simazine is and why it matters.
Health effects: Chronic exposure to simazine is associated with potential cancer risk; EPA classifies it as a possible human carcinogen (Group C) based on animal studies. Blood and nervous system effects have also been observed in animal studies. Long-term exposure at levels above the MCL is the primary concern for public water system violations.
Systems with a Simazine violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Quail Run Mobile Home Park El Paso County |
45 | 7 | 0 | |
|
Ridglea Industrial Center Tarrant County |
45 | 9 | 3 | |
|
Sunset Ridge RV Park Burnet County |
40 | 7 | 1 | |
|
Marquis Construction Yard Brazoria County |
40 | 6 | 1 | |
|
Lee Limas Mobile Home Park El Paso County |
39 | 13 | 4 | |
|
200 County Road 314 Williamson County |
37 | 7 | 1 | |
|
Old Dominion Tyler Terminal Smith County |
37 | 5 | 0 | |
|
Rayburn Water Resources Jasper County |
37 | 7 | 1 | |
|
Seaport Lakes Subdivision Calhoun County |
36 | 10 | 4 | |
|
Shafter Mine Presidio County |
32 | 13 | 4 | |
|
Waller County MUD 19 Waller County |
27 | 2 | 0 | |
|
Childrens Depot Bandera County |
25 | 9 | 3 | |
|
Franz Road Industrial Park Harris County |
25 | 3 | 1 | |
|
Hollister Business Park Harris County |
25 | 8 | 0 | |
|
Texas Rain Bastrop County |
25 | 5 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Simazine, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Simazine 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.