C58/100
PLYMOUTH, CITY OF — Water Quality Report 2026
Serving 1,060 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA0310004
Violations
26
Contaminant Test Results
EPA Violation History
2
Violations (last 5yr)
1
Unresolved
1
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2021 – December 31, 2021Rule: Stage 2 DBPREnforcement: Formal — state order issued
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 PLYMOUTH, CITY OF
Is PLYMOUTH, CITY OF water safe to drink?
PLYMOUTH, CITY OF water receives a grade of C (58/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 26 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has PLYMOUTH, CITY OF detected?
1 contaminants were tested in PLYMOUTH, CITY OF's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does PLYMOUTH, CITY OF have any EPA violations?
Yes, PLYMOUTH, CITY OF has 26 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, MCL, MON. 4 are health-based violations.
How many people does PLYMOUTH, CITY OF serve?
PLYMOUTH, CITY OF serves approximately 1,060 people, California. The system provides water to 1 community: Plymouth.
What type of water does PLYMOUTH, CITY OF provide?
PLYMOUTH, CITY OF 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 CA0310004.
How does PLYMOUTH, CITY OF compare to other utilities in California?
PLYMOUTH, CITY OF scores 58/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our California state page for a full comparison of water systems.