A95/100
CAL-WATER SERVICE CO.-MARYSVILLE — Water Quality Report 2026
Serving 12,419 people · California
Water Source
Groundwater
County
—
System ID
CA5810001
Violations
1
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1993.
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.-MARYSVILLE
Is CAL-WATER SERVICE CO.-MARYSVILLE water safe to drink?
CAL-WATER SERVICE CO.-MARYSVILLE water receives a grade of A (95/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has CAL-WATER SERVICE CO.-MARYSVILLE detected?
66 contaminants were tested in CAL-WATER SERVICE CO.-MARYSVILLE's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does CAL-WATER SERVICE CO.-MARYSVILLE have any EPA violations?
Yes, CAL-WATER SERVICE CO.-MARYSVILLE has 1 EPA violation(s) on record, with the most recent in 1993. Violation types include MCL. 1 are health-based violations.
How many people does CAL-WATER SERVICE CO.-MARYSVILLE serve?
CAL-WATER SERVICE CO.-MARYSVILLE serves approximately 12,419 people, California.
What type of water does CAL-WATER SERVICE CO.-MARYSVILLE provide?
CAL-WATER SERVICE CO.-MARYSVILLE sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA5810001.
How does CAL-WATER SERVICE CO.-MARYSVILLE compare to other utilities in California?
CAL-WATER SERVICE CO.-MARYSVILLE scores 95/100 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.