A97/100
SONORA WATER RESOURCES, INC — Water Quality Report 2026
Serving 1,154 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA5510024
Violations
3
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2006.
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 SONORA WATER RESOURCES, INC
Is SONORA WATER RESOURCES, INC water safe to drink?
SONORA WATER RESOURCES, INC water receives a grade of A (97/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has SONORA WATER RESOURCES, INC detected?
1 contaminants were tested in SONORA WATER RESOURCES, INC's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does SONORA WATER RESOURCES, INC have any EPA violations?
Yes, SONORA WATER RESOURCES, INC has 3 EPA violation(s) on record, with the most recent in 2006. Violation types include MR.
How many people does SONORA WATER RESOURCES, INC serve?
SONORA WATER RESOURCES, INC serves approximately 1,154 people, California.
What type of water does SONORA WATER RESOURCES, INC provide?
SONORA WATER RESOURCES, INC 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 CA5510024.
How does SONORA WATER RESOURCES, INC compare to other utilities in California?
SONORA WATER RESOURCES, INC scores 97/100 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.