A80/100
NAS NORTH ISLAND & NAB CORONADO — Water Quality Report 2026
Serving 36,990 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA3710750
Violations
4
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2008.
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 NAS NORTH ISLAND & NAB CORONADO
Is NAS NORTH ISLAND & NAB CORONADO water safe to drink?
NAS NORTH ISLAND & NAB CORONADO water receives a grade of A (80/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has NAS NORTH ISLAND & NAB CORONADO detected?
31 contaminants were tested in NAS NORTH ISLAND & NAB CORONADO's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does NAS NORTH ISLAND & NAB CORONADO have any EPA violations?
Yes, NAS NORTH ISLAND & NAB CORONADO has 4 EPA violation(s) on record, with the most recent in 2008. Violation types include MCL. 4 are health-based violations.
How many people does NAS NORTH ISLAND & NAB CORONADO serve?
NAS NORTH ISLAND & NAB CORONADO serves approximately 36,990 people, California.
What type of water does NAS NORTH ISLAND & NAB CORONADO provide?
NAS NORTH ISLAND & NAB CORONADO 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 CA3710750.
How does NAS NORTH ISLAND & NAB CORONADO compare to other utilities in California?
NAS NORTH ISLAND & NAB CORONADO scores 80/100 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.