2,3,7,8-TCDD (Dioxin) violations in Arizona
14 active public water systems in Arizona had a 2,3,7,8-TCDD (Dioxin) violation in the past three years, 1 of them in the latest quarter of EPA's data. What 2,3,7,8-TCDD (Dioxin) is and why it matters.
Systems with a 2,3,7,8-TCDD (Dioxin) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
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 | |
|
San Tan Mountain Casino Temporary Water System County |
7,990 | 2 | 0 | |
|
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 |
About this data
A system is counted once if any of its violations in the past three years involved 2,3,7,8-TCDD (Dioxin), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not 2,3,7,8-TCDD (Dioxin) 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.