Table of Contents

Report Summary
A Message from the Chief Operating Officer, Water System
A Message from the Director of Water Quality
L.A. Water Sources in 2025
Drinking Water and Your Health
Regulatory Compliance
Protecting Water Quality
Clean, Local, and Sustainable
Water Quality Service Areas in L.A.
Drinking Water Quality Monitoring Results
How to Read the 2025 Monitoring Results Tables
General Information
Non-English Message
Drinking Water Quality Report Summaries