A97/100
DUBLIN SAN RAMON SERVICES DISTRICT — Water Quality Report 2026
Serving 98,776 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA0110009
Violations
0
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.54 mg/L | 1.30 mg/L | Over Limit |
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 DUBLIN SAN RAMON SERVICES DISTRICT
Is DUBLIN SAN RAMON SERVICES DISTRICT water safe to drink?
DUBLIN SAN RAMON SERVICES DISTRICT water receives a grade of A (97/100), which is considered excellent. Out of 70 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has DUBLIN SAN RAMON SERVICES DISTRICT detected?
70 contaminants were tested in DUBLIN SAN RAMON SERVICES DISTRICT's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does DUBLIN SAN RAMON SERVICES DISTRICT have any EPA violations?
No, DUBLIN SAN RAMON SERVICES DISTRICT has zero EPA violations on record. This indicates consistent compliance with federal drinking water standards.
How many people does DUBLIN SAN RAMON SERVICES DISTRICT serve?
DUBLIN SAN RAMON SERVICES DISTRICT serves approximately 98,776 people, California.
What type of water does DUBLIN SAN RAMON SERVICES DISTRICT provide?
DUBLIN SAN RAMON SERVICES DISTRICT sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA0110009.
How does DUBLIN SAN RAMON SERVICES DISTRICT compare to other utilities in California?
DUBLIN SAN RAMON SERVICES DISTRICT scores 97/100 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.