A85/100
TOWN OF DISCOVERY BAY — Water Quality Report 2026
Serving 16,790 people · California
Water Source
Groundwater
County
—
System ID
CA0710009
Violations
3
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1997.
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 TOWN OF DISCOVERY BAY
Is TOWN OF DISCOVERY BAY water safe to drink?
TOWN OF DISCOVERY BAY water receives a grade of A (85/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has TOWN OF DISCOVERY BAY detected?
66 contaminants were tested in TOWN OF DISCOVERY BAY's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does TOWN OF DISCOVERY BAY have any EPA violations?
Yes, TOWN OF DISCOVERY BAY has 3 EPA violation(s) on record, with the most recent in 1997. Violation types include MCL. 3 are health-based violations.
How many people does TOWN OF DISCOVERY BAY serve?
TOWN OF DISCOVERY BAY serves approximately 16,790 people, California.
What type of water does TOWN OF DISCOVERY BAY provide?
TOWN OF DISCOVERY BAY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA0710009.
How does TOWN OF DISCOVERY BAY compare to other utilities in California?
TOWN OF DISCOVERY BAY scores 85/100 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.