Los Angeles, CA Tap Water Quality
Water safety reports for all 95 ZIP codes in Los Angeles, California
Average Score
77/100
Health Violations
95
ZIP Codes
95
High Lead Risk
59
of 95 ZIP codes
About Tap Water in Los Angeles, CA
The drinking water in Los Angeles, CA generally meets all federal health standards, earning a solid B grade with a composite safety score of 77/100 across 95 ZIP codes. While the primary water utility, Los Angeles-city, Department of Water & Power, maintains adequate compliance with EPA regulations, there have been minor or administrative violations on record. Overall, residents receive safe tap water that is actively monitored by California State Water Resources Control Board.
The accumulation of 95 health-based violations over the past 5 years highlights systemic challenges within Los Angeles's water infrastructure. When violations occur, it means that drinking water tests revealed contaminant levels exceeding safe limits, triggering mandatory corrective actions by California State Water Resources Control Board. The city relies on surface water, which may require significant treatment upgrades to address these recurring issues.
Additionally, lead exposure risk remains a critical issue for certain neighborhoods. EPA data indicates that 59 out of 95 ZIP codes in Los Angeles are rated as High or Very High risk for lead. This risk is often driven by aging homes with pre-1986 plumbing containing lead solder or service lines. Families in these areas should test their tap water and consider NSF/ANSI 53 certified filters.
Health-Based Contaminant Violations in Los Angeles
EPA records indicate that the following contaminants have exceeded Safe Drinking Water Act Maximum Contaminant Levels (MCLs) in Los Angeles water systems over the past 5 years.
Note: The presence of a past violation does not necessarily mean current water is unsafe. Utilities are required to take corrective action. Review your Consumer Confidence Report for the latest status.
Water Quality by ZIP Code — Los Angeles, CA
Click any ZIP code for the full water quality report
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Frequently Asked Questions — Los Angeles Water Quality
Is tap water safe to drink in Los Angeles, CA?+
What is the water quality score for Los Angeles?+
Does Los Angeles have lead in its tap water?+
How do I get the water quality report for Los Angeles?+
Where does Los Angeles's tap water come from?+
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