B78/100
SAN GABRIEL VALLEY WATER CO.-EL MONTE — Water Quality Report 2026
Serving 248,000 people · California
Water Source
Groundwater
County
—
System ID
CA1910039
Violations
4
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 460.00 µg/L | — | Above Goal |
1,4-dioxane | 0.630 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2019.
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 VALLEY WATER CO.-EL MONTE
Is SAN GABRIEL VALLEY WATER CO.-EL MONTE water safe to drink?
SAN GABRIEL VALLEY WATER CO.-EL MONTE water receives a grade of B (78/100), which is considered good. Out of 73 contaminants tested, none exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has SAN GABRIEL VALLEY WATER CO.-EL MONTE detected?
73 contaminants were tested in SAN GABRIEL VALLEY WATER CO.-EL MONTE's water. Notable contaminants include chlorate, 1,4-dioxane. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does SAN GABRIEL VALLEY WATER CO.-EL MONTE have any EPA violations?
Yes, SAN GABRIEL VALLEY WATER CO.-EL MONTE has 4 EPA violation(s) on record, with the most recent in 2019. Violation types include TT, MCL, Other. 3 are health-based violations.
How many people does SAN GABRIEL VALLEY WATER CO.-EL MONTE serve?
SAN GABRIEL VALLEY WATER CO.-EL MONTE serves approximately 248,000 people, California.
What type of water does SAN GABRIEL VALLEY WATER CO.-EL MONTE provide?
SAN GABRIEL VALLEY WATER CO.-EL MONTE sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA1910039.
How does SAN GABRIEL VALLEY WATER CO.-EL MONTE compare to other utilities in California?
SAN GABRIEL VALLEY WATER CO.-EL MONTE scores 78/100 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.