C54/100
CITY OF ATWATER — Water Quality Report 2026
Serving 29,479 people · California
Water Source
Groundwater
County
—
System ID
CA2410001
Violations
7
Contaminant Test Results
4 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFHxS | 0.059 µg/L | 0.010 µg/L | Over Limit |
PFOS | 0.045 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.033 µg/L | 0.004 µg/L | Over Limit |
vanadium | 36.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
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 ATWATER
Is CITY OF ATWATER water safe to drink?
CITY OF ATWATER water receives a grade of C (54/100), which is considered fair. 3 contaminant(s) exceed EPA legal limits and 7 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CITY OF ATWATER detected?
66 contaminants were tested in CITY OF ATWATER's water. Notable contaminants include PFOS, PFOA, PFHxS, vanadium. 3 exceed EPA legal limits (MCLs). 4 exceed EPA health goals (MCLGs).
Does CITY OF ATWATER have any EPA violations?
Yes, CITY OF ATWATER has 7 EPA violation(s) on record, with the most recent in 2014. Violation types include MR, MCL. 3 are health-based violations.
How many people does CITY OF ATWATER serve?
CITY OF ATWATER serves approximately 29,479 people, California. The system provides water to 1 community: Atwater.
What type of water does CITY OF ATWATER provide?
CITY OF ATWATER sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA2410001.
How does CITY OF ATWATER compare to other utilities in California?
CITY OF ATWATER scores 54/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our California state page for a full comparison of water systems.