Tapcensus

Simazine violations in Utah

29 active public water systems in Utah had a Simazine violation in the past three years, 1 of them still unresolved. 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

Unresolved first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Mount Pleasant City
Sanpete County 		4,040 3 0
Lehi City
Utah County 		93,446 2 0
Tooele City Water System
Tooele County 		41,770 2 0
Syracuse City Water System
Davis County 		35,561 1 0
Grantsville City
Tooele County 		16,284 2 0
Tremonton City
Box Elder County 		13,000 2 0
Salem City
Utah County 		11,281 1 0
Smithfield City
Cache County 		10,223 2 0
Cedar Hills Town Water System
Utah County 		10,015 1 0
Price Municipal Corporation
Carbon County 		9,960 2 0
Pleasant View Culinary Water
Weber County 		9,250 1 0
Utah State University
Cache County 		9,000 2 1
Enoch City Water System
Iron County 		6,500 5 0
Fruit Heights City Water System
Davis County 		6,075 2 0
Alta Town Water System
Salt Lake County 		5,228 2 0
Cedar Valley Water Conservancy
Iron County 		3,995 6 0
Blanding City
San Juan County 		3,500 3 0
Centerfield Town Water System
Sanpete County 		1,700 3 0
Moroni City
Sanpete County 		1,600 7 0
Circleville Town Water System
Piute County 		500 3 0
Charleston Wcd
Wasatch County 		484 8 0
Wallsburg Town Water System
Wasatch County 		440 6 0
Skyline Mine
Carbon County 		430 3 0
Oak Haven Water Company
Wasatch County 		388 6 1
Laketown
Rich County 		380 6 0
Wales Town Water System
Sanpete County 		300 2 0
Harmony Heights Water Company
Washington County 		120 7 0
North Valley Ranches Sub
Washington County 		78 10 3
Central Culinary Water CO
Washington County 		35 6 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 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. Retrieved from ECHO on Oct 11, 2026.