EPCOR - WILLOW VALLEY/KING STREET — Water Quality Report 2026
Serving 3,408 people · Arizona
Contaminant Test Results
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 3.30 mg/L | 1.30 mg/L | Over Limit |
strontium | 2600.00 µg/L | — | Above Goal |
chlorate | 1000.00 µg/L | — | Above Goal |
EPA Violation History
5
Violations (last 5yr)
1
Unresolved
1
Health-Related
Exceeded the Maximum Contaminant Level (running average)
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
Understanding violation severity
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly