A100/100
CITY OF HAYWARD — Water Quality Report 2026
Serving 162,954 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA0110006
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 CITY OF HAYWARD
Is CITY OF HAYWARD water safe to drink?
CITY OF HAYWARD water receives a grade of A (100/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has CITY OF HAYWARD detected?
76 contaminants were tested in CITY OF HAYWARD's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does CITY OF HAYWARD have any EPA violations?
No, CITY OF HAYWARD has zero EPA violations on record. This indicates consistent compliance with federal drinking water standards.
How many people does CITY OF HAYWARD serve?
CITY OF HAYWARD serves approximately 162,954 people, California. The system provides water to 1 community: Hayward.
What type of water does CITY OF HAYWARD provide?
CITY OF HAYWARD 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 CA0110006.
How does CITY OF HAYWARD compare to other utilities in California?
CITY OF HAYWARD 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.