B64/100
MENDOTA, CITY OF — Water Quality Report 2026
Serving 11,404 people · California
Water Source
Groundwater
County
—
System ID
CA1010021
Violations
13
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.40 mg/L | 1.30 mg/L | Over Limit |
chlorate | 408.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2016.
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 MENDOTA, CITY OF
Is MENDOTA, CITY OF water safe to drink?
MENDOTA, CITY OF water receives a grade of B (64/100), which is considered good. Out of 70 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MENDOTA, CITY OF detected?
70 contaminants were tested in MENDOTA, CITY OF's water. Notable contaminants include Copper (90th percentile), chlorate. 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does MENDOTA, CITY OF have any EPA violations?
Yes, MENDOTA, CITY OF has 13 EPA violation(s) on record, with the most recent in 2016. Violation types include MR, MCL. 3 are health-based violations.
How many people does MENDOTA, CITY OF serve?
MENDOTA, CITY OF serves approximately 11,404 people, California. The system provides water to 1 community: Mendota.
What type of water does MENDOTA, CITY OF provide?
MENDOTA, CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA1010021.
How does MENDOTA, CITY OF compare to other utilities in California?
MENDOTA, CITY OF scores 64/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our California state page for a full comparison of water systems.