Lake Notice Lake & river toxic algae advisories

Placer County: lake and river algae advisories

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

WaterLatest record
American RiverCaution advisory, last posted May 25, 2021. No all-clear recorded.
Bear CreekAlgal mat alert sign, last posted Aug 18, 2025. No all-clear recorded.
Combie lakeCaution advisory, last posted Aug 5, 2026. No all-clear recorded.
Duncan CreekCaution advisory, last posted Jul 14, 2021. No all-clear recorded.
Lake ClementineCaution advisory, last posted Sep 24, 2024. No all-clear recorded.
Lake EstelleCaution advisory, last posted Aug 21, 2024. No all-clear recorded.
Lake TahoeCaution advisory, last posted Oct 7, 2026. No all-clear recorded.
North Fork American RiverCaution advisory, last posted Oct 23, 2024. No all-clear recorded.
Pleasant Grove Creek South ForkAlgal mat alert sign, last posted May 8, 2024. No all-clear recorded.
South Yuba RiverCaution advisory, last posted Sep 9, 2026. No all-clear recorded.
Cold StreamThe state's latest record, from Sep 13, 2022, recommends no advisory.
Dollar Creek ReserviorThe state's latest record, from Aug 13, 2024, recommends no advisory.
Folsom LakeThe state's latest record, from Jul 7, 2026, recommends no advisory.
Monumental CreekThe state's latest record, from Jun 30, 2021, recommends no advisory.
Strap RavineReports on file, with no advisory level the state has classified.
Swan LakeThe state's latest record, from Oct 24, 2018, recommends no advisory.
Unnamed lakeThe state's latest record, from Aug 17, 2020, recommends no advisory.
Unnamed pondThe state's latest record, from Sep 23, 2019, recommends no advisory.
Unnamed tributary of North Fork of the Middle Fork American RiverReports on file, with no advisory level the state has classified.
Unnamed Tributary to Onion CreekThe state's latest record, from May 20, 2026, recommends no advisory.