A100/100
GSWC - WILLOWBROOK — Water Quality Report 2026
Serving 10,747 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA1910072
Violations
0
Contaminant Test Results
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 GSWC - WILLOWBROOK
Is GSWC - WILLOWBROOK water safe to drink?
GSWC - WILLOWBROOK water receives a grade of A (100/100), which is considered excellent. Out of 51 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has GSWC - WILLOWBROOK detected?
51 contaminants were tested in GSWC - WILLOWBROOK's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does GSWC - WILLOWBROOK have any EPA violations?
No, GSWC - WILLOWBROOK has zero EPA violations on record. This indicates consistent compliance with federal drinking water standards.
How many people does GSWC - WILLOWBROOK serve?
GSWC - WILLOWBROOK serves approximately 10,747 people, California.
What type of water does GSWC - WILLOWBROOK provide?
GSWC - WILLOWBROOK 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 CA1910072.
How does GSWC - WILLOWBROOK compare to other utilities in California?
GSWC - WILLOWBROOK scores 100/100 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.