Lake Notice Lake & river toxic algae advisories

Inyo County: lake and river algae advisories

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

WaterLatest record
Diaz LakeCaution advisory, last posted Aug 29, 2023. No all-clear recorded.
Long LakeCaution advisory, last posted Sep 28, 2021. No all-clear recorded.
MillpondCaution advisory, last posted Sep 2, 2016. No all-clear recorded.
Pleasant Valley ReservoirDanger advisory, last posted Aug 21, 2026. No all-clear recorded.
Tinemaha ReservoirVisual observation, last posted Sep 3, 2025. No all-clear recorded.
Horseshoe LakeThe state's latest record, from Jun 30, 2021, recommends no advisory.
Lake GeorgeThe state's latest record, from Oct 14, 2022, recommends no advisory.
Owens RiverThe state's latest record, from Jul 6, 2022, recommends no advisory.