Algal blooms are composed of one or more species of phytoplankton. Some blooms are 'red tides', appearing brown to red in color, and some of these can be harmful to people or wildlife depending on the species forming the bloom. Other blooms are not visible but can still cause health problems. Learn more about algal blooms and algal bloom monitoring activities on the pages listed below.
Note: CeNCOOS is not a regulatory agency. For health and safety information please contact the California Department of Public Health, the US Coast Guard or County Environmental Health Agencies in your area.
An experimental predictive Harmful Algal Bloom (HAB) model for California provides forecasts of Pseudo-nitzschia (a marine diatom) blooms and Domoic Acid (the potentially harmful biotoxin Pseudo-nitzschia releases) probabilities.
HABs focused page on algal bloom monitoring in central and southern California, includes HABs news, introduction to HABs, and latest and historical HABs sampling data. This page is part of the CalHABMAP program and is maintained by SCCOOS.
Currently, phytoplankton are monitored at the Santa Cruz Wharf and the Monterey Munical Wharf. Weekly sampling includes phytoplankton identification, toxin testing, bacteria monitoring, and nutrient analysis. The program in Santa Cruz has existed since 2006 and sampling began at the Monterey Wharf in 2003.
For information on quarantines, health advisories, statewide closures, marine biotoxin reports and state phytoplankton monitoring efforts see the California Department of Public Health Website.
The latest chlorophyll and sea surface temperature satellite images combined with maps of real-time HF Radar surface currents.
Real-time chlorophyll and water quality measurements along the coastline of central and northern California.