Tapcensus

Simazine violations in Arizona

15 active public water systems in Arizona had a Simazine violation in the past three years, 1 of them in the latest quarter of EPA's data. 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
SystemServesStatusRules violated, 3 yrUnresolved
Scua Bylas
Bylas · County 		3,160 12 3
Gilbert, Town of
Gilbert · Maricopa County 		247,600 9 1
Epcor Agua Fria
Surprise · Maricopa County 		128,040 5 0
GW Santa Cruz Water CO
Maricopa · Pinal County 		84,000 7 0
Flagstaff City of
Flagstaff · Coconino County 		79,796 5 0
Goodyear Water Department
Goodyear · Maricopa County 		50,001 4 0
Bullhead City Mohave
Bullhead City · Mohave County 		36,330 13 1
Apache Junction Water District
Apache Junction · Pinal County 		15,610 6 0
Pueblo del Sol Water Company
Sierra Vista · Cochise County 		12,804 4 0
Scua Upper Seven Mile
County 		8,478 12 3
Aspc Lewis Complex Water System
Buckeye · Maricopa County 		4,300 6 1
Arizona Village
County 		3,211 10 2
Lower Moencopi Spring Source
Lower Moencopi · County 		465 12 3
Katherine Resorts Water Company
Bullhead City · Mohave County 		58 7 0
Sasabe Border Village
Sasabe · Pima County 		31 5 1
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 Arizona 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.