A100/100
SAN GABRIEL COUNTY WD — Water Quality Report 2026
Serving 39,345 people · California
Water Source
Groundwater
County
—
System ID
CA1910144
Violations
0
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 400.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
This system has a clean compliance history.
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 SAN GABRIEL COUNTY WD
Is SAN GABRIEL COUNTY WD water safe to drink?
SAN GABRIEL COUNTY WD water receives a grade of A (100/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has SAN GABRIEL COUNTY WD detected?
66 contaminants were tested in SAN GABRIEL COUNTY WD's water. Notable contaminants include chlorate. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does SAN GABRIEL COUNTY WD have any EPA violations?
No, SAN GABRIEL COUNTY WD has zero EPA violations on record. This indicates consistent compliance with federal drinking water standards.
How many people does SAN GABRIEL COUNTY WD serve?
SAN GABRIEL COUNTY WD serves approximately 39,345 people, California.
What type of water does SAN GABRIEL COUNTY WD provide?
SAN GABRIEL COUNTY WD sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA1910144.
How does SAN GABRIEL COUNTY WD compare to other utilities in California?
SAN GABRIEL COUNTY WD scores 100/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our California state page for a full comparison of water systems.