A100/100
OLIVENHAIN MWD — Water Quality Report 2026
Serving 86,458 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA3710029
Violations
0
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
This system has a clean compliance history.
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 OLIVENHAIN MWD
Is OLIVENHAIN MWD water safe to drink?
OLIVENHAIN MWD water receives a grade of A (100/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has OLIVENHAIN MWD detected?
69 contaminants were tested in OLIVENHAIN MWD's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does OLIVENHAIN MWD have any EPA violations?
No, OLIVENHAIN MWD has zero EPA violations on record. This indicates consistent compliance with federal drinking water standards.
How many people does OLIVENHAIN MWD serve?
OLIVENHAIN MWD serves approximately 86,458 people, California.
What type of water does OLIVENHAIN MWD provide?
OLIVENHAIN MWD 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 CA3710029.
How does OLIVENHAIN MWD compare to other utilities in California?
OLIVENHAIN MWD scores 100/100 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.