Lake Notice Lake & river toxic algae advisories

Sacramento County: lake and river algae advisories

39 waters in Sacramento 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 Sep 29, 2025. No all-clear recorded.
Camden LakeDanger advisory, last posted Oct 18, 2022. No all-clear recorded.
Granite ParkCaution advisory, last posted Oct 19, 2022. No all-clear recorded.
Laguna CreekCaution advisory, last posted Jul 28, 2020. No all-clear recorded.
Lake NatomaGeneral awareness, last posted Nov 18, 2022. No all-clear recorded.
Mather LakeCaution advisory, last posted Aug 25, 2025. No all-clear recorded.
Mather Regional ParkCaution advisory, last posted Sep 16, 2025. No all-clear recorded.
McKinley ParkWarning advisory, last posted Jun 4, 2025. No all-clear recorded.
Mokelumne RiverVisual observation, last posted Nov 6, 2023. No all-clear recorded.
Natomas ParkCaution advisory, last posted Jun 22, 2021. No all-clear recorded.
North Natomas Regional ParkCaution advisory, last posted Jun 30, 2021. No all-clear recorded.
Peace PondCaution advisory, last posted Jul 7, 2025. No all-clear recorded.
Pocket CanalCaution advisory, last posted Jun 24, 2026. No all-clear recorded.
River Birch ParkCaution advisory, last posted Jun 30, 2021. No all-clear recorded.
Sacramento RiverCaution advisory, last posted Oct 5, 2020. No all-clear recorded.
San Joaquin RiverDanger advisory, last posted Aug 5, 2022. No all-clear recorded.
Seven Mile SloughCaution advisory, last posted Sep 1, 2021. No all-clear recorded.
Sherman LakeCaution advisory, last posted Sep 2, 2022. No all-clear recorded.
Southside parkCaution advisory, last posted Oct 19, 2022. No all-clear recorded.
Tanzanite ParkWarning advisory, last posted Jun 17, 2022. No all-clear recorded.
Three Mile SloughVisual observation, last posted Nov 6, 2023. No all-clear recorded.
Unnamed pondCaution advisory, last posted Jul 21, 2025. No all-clear recorded.
William Land ParkVisual observation, last posted Aug 23, 2024. No all-clear recorded.
Arcade LakeThe state's latest record, from Dec 4, 2018, recommends no advisory.
Elk Grove Regional ParkThe state's latest record, from Aug 19, 2025, recommends no advisory.
Elk Grove Regional Park LakeThe state's latest record, from Jun 18, 2026, recommends no advisory.
Gibson LakeThe state's latest record, from Aug 27, 2026, recommends no advisory.
Hagan Community ParkThe state's latest record, from Aug 19, 2025, recommends no advisory.
Howe Community ParkThe state's latest record, from Aug 19, 2025, recommends no advisory.
Lower American RiverReports on file, with no advisory level the state has classified.
Natomas East Main Drainage CanalThe state's latest record, from May 24, 2017, recommends no advisory.
North Laguna Creek ParkThe state's latest record, from Jun 4, 2025, recommends no advisory.
North Laguna PondThe state's latest record, from Oct 19, 2022, recommends no advisory.
North Natomas Retention BasinThe state's latest record, from Sep 12, 2025, recommends no advisory.
Stone Lakes National Wildlife RefugeThe state's latest record, from Oct 17, 2019, recommends no advisory.
Tanzanite Park PondReports on file, with no advisory level the state has classified.
Turtle PondThe state's latest record, from Jun 23, 2026, recommends no advisory.
Unnamed Retention BasinThe state recorded an end date of Oct 8, 2022.
Washington LakeThe state's latest record, from Aug 23, 2018, recommends no advisory.