Nickel violations in Arizona
2 active public water systems in Arizona had a Nickel violation in the past three years. What Nickel is and why it matters.
Health effects: Chronic oral exposure to nickel in drinking water is associated with cardiovascular and kidney effects. Nickel compounds are classified as known human carcinogens (Group A) by IARC for inhalation; the oral carcinogenicity evidence is less established. Individuals with nickel sensitivity may also experience dermatological reactions.
Systems with a Nickel violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
GW Santa Cruz Water CO Maricopa · Pinal County |
84,000 | 7 | 0 | |
|
Bullhead City Mohave Bullhead City · Mohave County |
36,330 | 13 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Nickel, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nickel 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.