A beach is closed anytime there is a known sewage or chemical spill impacting ocean waters. Water contact may cause someone to become ill. When a beach is closed, the Department of Public Health advises beach users to avoid all contact with ocean water in the closure area and where closure signs are posted.
|Ocean Water Quality Rain Advisory
A rain advisory is issued when there is significant rainfall that may cause bacteria levels in ocean waters to increase. Bacteria levels can increase significantly during and after rainstorms, as contaminants within the runoff enters the ocean. Bacteria levels may remain elevated up to 3 days depending upon the intensity of the rain and the volume of runoff. Elevated bacteria levels in ocean water may cause illness, especially in children and the elderly. The Department of Public Health recommends that beach users avoid contact with ocean water for a period of 3 days after significant rainfall, especially near flowing storm drains, creeks and rivers.
Beach Water Quality
This map is updated as conditions change.
Water Quality Sampling
Laboratory results from four local agencies are displayed on the map. The Los Angeles County Department of Public Health (DPH) Environmental Health Recreational Waters Program, collects ocean water samples from the mainland, once a week throughout the year. DPH collects an additional five samples from Avalon on Santa Catalina Island beginning in April through October. The Los Angeles County Sanitation Districts (SD) collects ocean water samples at selected sites on the mainland, once each week throughout the year. The Beach Cities of Redondo Beach, Manhattan Beach and Hermosa Beach (BC) jointly collect water samples within their cities, once a week throughout the year. DPH, SD, and BC also resample sites that have exceeded State Standards for bacteria in ocean water. The City of Los Angeles, Environmental Monitoring Division, LA Sanitation (HYP) collects water samples from various sites, one to five times per week, all year round. LA City also collects samples at some DPH sites as required by their State NPDES permit.
The public is notified when a site has exceeded State Standards for bacteria in ocean water on this website, by telephone hotline, and by signs posted at the impacted beaches.
Ocean Water Quality Rain Advisory
NowCast Predictive Modeling
FREQUENTLY ASKED QUESTIONS and INFO (Link)
County of Los Angeles Public Health
This project has been funded wholly or in part by the State Water Resources Control Board and the United States Environmental Protection Agency under Clean Water Act's Beaches Environmental Assessment and Coastal Health Program. The contents of this document do not necessarily reflect the views and policies of the United States Environmental Protection Agency or the State Water Resources Control Board, nor does the United States Environmental Protection Agency or the State Water Resources Control Board endorse trade names or recommend the use of commercial products mentioned in this document.