B75/100
CAL-WATER SERVICE CO.-CHICO — Water Quality Report 2026
Serving 114,925 people · California
Water Source
Groundwater
County
—
System ID
CA0410002
Violations
5
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2002.
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 CAL-WATER SERVICE CO.-CHICO
Is CAL-WATER SERVICE CO.-CHICO water safe to drink?
CAL-WATER SERVICE CO.-CHICO water receives a grade of B (75/100), which is considered good. Out of 73 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has CAL-WATER SERVICE CO.-CHICO detected?
73 contaminants were tested in CAL-WATER SERVICE CO.-CHICO's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does CAL-WATER SERVICE CO.-CHICO have any EPA violations?
Yes, CAL-WATER SERVICE CO.-CHICO has 5 EPA violation(s) on record, with the most recent in 2002. Violation types include MCL. 5 are health-based violations.
How many people does CAL-WATER SERVICE CO.-CHICO serve?
CAL-WATER SERVICE CO.-CHICO serves approximately 114,925 people, California.
What type of water does CAL-WATER SERVICE CO.-CHICO provide?
CAL-WATER SERVICE CO.-CHICO sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA0410002.
How does CAL-WATER SERVICE CO.-CHICO compare to other utilities in California?
CAL-WATER SERVICE CO.-CHICO scores 75/100 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.