TTHM (Total Trihalomethanes) violations in Missouri
107 active public water systems in Missouri had a TTHM (Total Trihalomethanes) violation in the past three years, 18 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 |
|---|---|---|---|---|
|
Opal Foods LLC Neosho · Newton County |
75 | 4 | 1 | |
|
Franklin County Pwsd 1 Cardinal Meadows Franklin County |
52 | 3 | 0 | |
|
Wall Eye Haven MHP Forsyth · Taney County |
50 | 7 | 1 | |
|
Oak Shadows Subdivision Osage Beach · Camden County |
36 | 5 | 2 | |
|
Branson Airport LLC Branson · Taney County |
25 | 2 | 0 | |
|
Buchheit INC Perryville · Perry County |
25 | 7 | 1 | |
|
Ozark Stave Products Newton County |
25 | 3 | 1 |
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 Missouri 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.