F7/100
PHOENIX CITY OF — Water Quality Report 2026
Serving 1,695,000 people · Arizona
Water Source
Surface Water
County
—
System ID
AZ0407025
Violations
75
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 440.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
2
Unresolved
0
Health-Related
TIER 3Unresolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: May 1, 2025 – May 31, 2025Rule: Surface Water Treatment RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: May 1, 2025 – May 31, 2025Rule: Total Coliform RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About PHOENIX CITY OF
Is PHOENIX CITY OF water safe to drink?
PHOENIX CITY OF water receives a grade of F (7/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 75 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has PHOENIX CITY OF detected?
76 contaminants were tested in PHOENIX CITY OF's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does PHOENIX CITY OF have any EPA violations?
Yes, PHOENIX CITY OF has 75 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MON, TT. 3 are health-based violations.
How many people does PHOENIX CITY OF serve?
PHOENIX CITY OF serves approximately 1,695,000 people, Arizona. The system provides water to 1 community: Phoenix.
What type of water does PHOENIX CITY OF provide?
PHOENIX CITY OF sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is AZ0407025.
How does PHOENIX CITY OF compare to other utilities in Arizona?
PHOENIX CITY OF scores 7/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Arizona state page for a full comparison of water systems.