B74/100
NPS GGNRA — Water Quality Report 2026
Serving 18,447 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA2110350
Violations
10
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2015.
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 NPS GGNRA
Is NPS GGNRA water safe to drink?
NPS GGNRA water receives a grade of B (74/100), which is considered good. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has NPS GGNRA detected?
31 contaminants were tested in NPS GGNRA's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does NPS GGNRA have any EPA violations?
Yes, NPS GGNRA has 10 EPA violation(s) on record, with the most recent in 2015. Violation types include TT, MCL, MR. 4 are health-based violations.
How many people does NPS GGNRA serve?
NPS GGNRA serves approximately 18,447 people, California.
What type of water does NPS GGNRA provide?
NPS GGNRA 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 CA2110350.
How does NPS GGNRA compare to other utilities in California?
NPS GGNRA scores 74/100 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.