Copper, Free in drinking water
1 active public water systems in 1 state had a Copper, Free violation in the past three years, and 1 had one in the latest quarter of EPA's data.
You are on Tapcensus, an independent guide to the EPA compliance records of every public water system in the United States. This page explains Copper, Free and lists the water systems whose records include a related violation. It does not show measured levels.
Is Copper, Free in the records for your water system?
Enter a ZIP code, town, or street address to see the water systems that serve your area, their status, and which rules and contaminants appear in their violations.
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The standard and what a violation means
Water systems with a Copper, Free violation, by state
Active public water systems that reported at least one related violation to EPA in the past three years. Each state links to the list of its affected systems.
| State | Systems with violations, 3 yr | Share of active systems | In violation, latest quarter |
|---|---|---|---|
| California | 1 | 0% | 1 |
Largest water systems with a Copper, Free violation
The ten biggest systems, by people served, whose records include a related violation in the past three years.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Cazadero Water Company, Inc. (puc) Sonoma County |
525 | 3 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved Copper, Free, including monitoring and reporting lapses. Rules violated and status in the systems table are for the whole system, not Copper, Free alone. Counts cover active systems in all 50 states and the District of Columbia.
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 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.