TTHM (Total Trihalomethanes) violations in Utah
59 active public water systems in Utah had a TTHM (Total Trihalomethanes) violation in the past three years, 1 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 |
|---|---|---|---|---|
|
Tintic Consolidated Water System Utah County |
100 | 1 | 0 | |
|
Eastland Special Service District San Juan County |
90 | 2 | 0 | |
|
Thompson Special Services District Grand County |
85 | 5 | 1 | |
|
Bonanza Water System County |
81 | 2 | 0 | |
|
Pole Patch Water System Weber County |
80 | 6 | 1 | |
|
Park Valley School Box Elder County |
50 | 1 | 0 | |
|
Bicknell Bottoms Wayne County |
45 | 2 | 0 | |
|
Central Culinary Water CO Washington County |
35 | 6 | 0 | |
|
Wildwood Water LLC Weber County |
32 | 3 | 0 |
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 Utah 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.