When: May 1, 2021 – June 2, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
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.
When: May 1, 2021 – May 31, 2021Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 1 — URGENTResolved
Maximum Residual Disinfectant Level Violation
When: May 1, 2021 – May 31, 2021Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
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.
When: May 1, 2021 – May 31, 2021Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
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 CITY OF YUMA
Is CITY OF YUMA water safe to drink?
CITY OF YUMA water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 238 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CITY OF YUMA detected?
76 contaminants were tested in CITY OF YUMA's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does CITY OF YUMA have any EPA violations?
Yes, CITY OF YUMA has 238 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, Other, MRDL. 24 are health-based violations.
How many people does CITY OF YUMA serve?
CITY OF YUMA serves approximately 103,264 people, Arizona. The system provides water to 1 community: Yuma.
What type of water does CITY OF YUMA provide?
CITY OF YUMA 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 AZ0414024.
How does CITY OF YUMA compare to other utilities in Arizona?
CITY OF YUMA scores 0/100 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.