A84/100
SOUTH MESA WC — Water Quality Report 2026
Serving 10,108 people · California
Water Source
Groundwater
County
—
System ID
CA3310017
Violations
8
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
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 SOUTH MESA WC
Is SOUTH MESA WC water safe to drink?
SOUTH MESA WC water receives a grade of A (84/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has SOUTH MESA WC detected?
31 contaminants were tested in SOUTH MESA WC's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does SOUTH MESA WC have any EPA violations?
Yes, SOUTH MESA WC has 8 EPA violation(s) on record, with the most recent in 2014. Violation types include MCL, MR, Other. 2 are health-based violations.
How many people does SOUTH MESA WC serve?
SOUTH MESA WC serves approximately 10,108 people, California.
What type of water does SOUTH MESA WC provide?
SOUTH MESA WC sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA3310017.
How does SOUTH MESA WC compare to other utilities in California?
SOUTH MESA WC scores 84/100 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.