Ventura County: lake and river algae advisories

8 waters in Ventura County appear in the state's harmful algal bloom records. Waters whose latest record is an advisory come first.

Waters in Ventura County and what the state's latest record says
WaterLatest record
Potrero CreekVisual observation, last posted Apr 13, 2026. No all-clear recorded.
Pacific OceanReports on file, with no advisory level the state has classified.
Rancho Nuevo CreekThe state's latest record, from Mar 27, 2026, recommends no advisory.
Rock CreekThe state's latest record, from May 31, 2022, recommends no advisory.
Santa Paula CreekThe state's latest record, from Jun 30, 2023, recommends no advisory.
Santa Paula RiverReports on file, with no advisory level the state has classified.
Sespe CreekReports on file, with no advisory level the state has classified.
Unnamed outfallReports on file, with no advisory level the state has classified.