Lake Tahoe: toxic algae advisories
Lake Tahoe, Placer County. See all Placer County waters.
What the state's records say
Caution advisory, last posted Oct 7, 2026. No all-clear recorded.
3 reported spots here have an advisory with no all-clear recorded.
Reporting is voluntary, so the state may not have recorded an end even if conditions changed. Check posted signs and the official map.
What this level asks: Algae that can make toxins may be present. Keep people, children and pets away from algae and scum, and do not let pets drink the water.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Lake Tahoe
The state has an advisory on file for Lake Tahoe (Caution advisory), last posted Oct 7, 2026, and no all-clear recorded. Keep your dog out of the water and away from scum on the shore until the state records an end.
Reported spots
The state records each report at a spot, such as a beach or a boat ramp. Each spot's latest deciding record:
| Spot | Status |
|---|---|
| Kings Beach | Caution advisory, last posted Oct 7, 2026. No all-clear recorded. |
| Commons Beach | The state's latest record, from Aug 27, 2024, recommends no advisory. |
| Speedboat Beach | The state's latest record, from Jul 31, 2024, recommends no advisory. |
| Star Harbor | Caution advisory, last posted Apr 11, 2023. No all-clear recorded. |
| Kings Beach | Caution advisory, last posted Jun 9, 2022. No all-clear recorded. |
| McKinney Bay | The state's latest record, from Apr 5, 2022, recommends no advisory. |
| Sunnyside Marina Beach | The state's latest record, from Mar 18, 2022, recommends no advisory. |
| Inlet/stream at Skylandia Beach | The state's latest record, from Feb 15, 2022, recommends no advisory. |
| North shore near Bristlecone Beach (near Tahoe City) | The state's latest record, from Apr 23, 2021, recommends no advisory. |
Advisory history
Every advisory record the state has published for Lake Tahoe, newest first. "None" is the state's record that no advisory was recommended on that date. "NA" records do not change a status.
| Date | Spot | State's level | Notes |
|---|---|---|---|
| Oct 7, 2026 | Kings Beach | Caution | Advisory based on visual and toxins |
| Aug 28, 2026 | Kings Beach | Visual observation | Posted general awareness; Testing results below posting triggers; visual monitoring based advisory |
| Jun 25, 2026 | Kings Beach | None | Advisory based on visual and toxins |
| May 12, 2026 | Kings Beach | None | Advisory based on visual and toxins |
| May 8, 2026 | Kings Beach | None | Visual monitoring only-absent bloom |
| Aug 22, 2025 | Kings Beach | None | Testing results below posting triggers |
| Jun 26, 2025 | Kings Beach | None | Testing results below posting triggers |
| May 23, 2025 | Kings Beach | None | Advisory based on visual and toxins; Testing results below posting triggers |
| Oct 9, 2024 | Kings Beach | None | Advisory based on visual and toxins; Testing results below posting triggers |
| Aug 27, 2024 | Commons Beach | None | Visual monitoring only-absent bloom |
| Aug 27, 2024 | Kings Beach | None | Advisory based on visual and toxins |
| Jul 31, 2024 | Speedboat Beach | None | Visual monitoring only-absent bloom |
| Jun 26, 2024 | Kings Beach | None | Visual monitoring only-absent bloom |
| Jun 26, 2024 | Commons Beach | None | Visual monitoring only-absent bloom |
| Apr 11, 2023 | Star Harbor | Caution | Under investigation |
| Jun 9, 2022 | Kings Beach | Caution | Suspected bloom, investigation ongoing |
| Jun 9, 2022 | Kings Beach | Caution | Suspected bloom, investigation ongoing |
| Apr 5, 2022 | McKinney Bay | None | No cyano, other algae present. |
| Mar 18, 2022 | Sunnyside Marina Beach | None | No cyano, other algae present. |
| Feb 15, 2022 | Inlet/stream at Skylandia Beach | None | Updates from routine monitoring program-organization |
| Apr 23, 2021 | North shore near Bristlecone Beach (near Tahoe City) | None | Testing results below posting triggers |
Source
Advisory data: California State Water Resources Control Board, Freshwater Harmful Algal Bloom Program, via data.ca.gov (public domain). Advisories are recommendations; reporting is voluntary and incomplete. The state's data. An advisory ends only when the state records a later "None" (no advisory recommended) at the same spot, or an end date. A blank end date is unknown.