Los Angeles Tap Water
Water provider: Los Angeles Department of Water and Power (Los Angeles, CA)
Our recommendation
Premium filter strongly recommended
Your water has contaminants that require stronger filtration (heavy metals, PFAS, or limits exceeded). Reverse osmosis is the recommended tier.
See recommended water filters →What is in the water
Chromium-6 (hexavalent chromium)
DetectedIndustrial contaminant. Known human carcinogen. Unregulated at the federal level in the US.
Reported: ~0.2 ppb
California MCL 10 ppb; public health goal 0.02 ppb.
Trihalomethanes (THMs)
DetectedDisinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure linked to cancer risk.
Reported: ~20 ppb
Arsenic
DetectedNaturally occurring heavy metal. Long-term exposure linked to cancer and cardiovascular disease.
Reported: ~2 ppb · Limit: 10 ppb
Lead
DetectedA heavy metal that leaches from older plumbing. No safe exposure level for children. Linked to developmental and cognitive harm.
Reported: below action level
Source
Data from the LADWP Annual Drinking Water Quality Report (2023). Last reviewed 2024-11-01.
Note: Contaminant levels vary by address (older plumbing can leach lead even when the source water does not), sampling location, and time of year. The figures above reflect utility-wide averages from the most recent public report. If you have specific health concerns, request a full report from your utility or test your own tap water.