A81/100
SAN ANTONIO WATER COMPANY — Water Quality Report 2026
Serving 3,111 people · California
Water Source
Groundwater
County
—
System ID
CA3610085
Violations
4
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.011 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2015.
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 SAN ANTONIO WATER COMPANY
Is SAN ANTONIO WATER COMPANY water safe to drink?
SAN ANTONIO WATER COMPANY water receives a grade of A (81/100), which is considered excellent. Out of 51 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has SAN ANTONIO WATER COMPANY detected?
51 contaminants were tested in SAN ANTONIO WATER COMPANY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does SAN ANTONIO WATER COMPANY have any EPA violations?
Yes, SAN ANTONIO WATER COMPANY has 4 EPA violation(s) on record, with the most recent in 2015. Violation types include MCL, MR. 3 are health-based violations.
How many people does SAN ANTONIO WATER COMPANY serve?
SAN ANTONIO WATER COMPANY serves approximately 3,111 people, California.
What type of water does SAN ANTONIO WATER COMPANY provide?
SAN ANTONIO WATER COMPANY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA3610085.
How does SAN ANTONIO WATER COMPANY compare to other utilities in California?
SAN ANTONIO WATER COMPANY scores 81/100 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.