Tahoe Keys Lagoon: toxic algae advisories
Tahoe Keys Lagoon, El Dorado County. See all El Dorado County waters.
What the state's records say
Warning advisory, last posted Aug 21, 2026. No all-clear recorded.
13 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: Toxins may be at levels that can harm people and animals. Do not swim or let children or pets in the water, and stay away from scum.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Tahoe Keys Lagoon
The state has an advisory on file for Tahoe Keys Lagoon (Warning advisory), last posted Aug 21, 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 |
|---|---|
| Traverse (Site I) | The state's latest record, from Oct 13, 2026, recommends no advisory. |
| Venice Marconi (Site 6) | The state's latest record, from Oct 13, 2026, recommends no advisory. |
| Slalom Court (Site H) | Caution advisory, last posted Aug 21, 2026. No all-clear recorded. |
| Marina by beginning of rubicon dock | The state's latest record, from Jun 11, 2026, recommends no advisory. |
| Site 18 | Caution advisory, last posted Aug 18, 2025. No all-clear recorded. |
| Site 25 | Caution advisory, last posted Jul 26, 2024. No all-clear recorded. |
| Site 13 | Caution advisory, last posted Jul 26, 2024. No all-clear recorded. |
| Venice Alpine (634TKL008) | Warning advisory, last posted Jul 25, 2024. No all-clear recorded. |
| Emerald / Marconi West | Caution advisory, last posted Jul 12, 2024. No all-clear recorded. |
| Spinnaker Cove (Site 7) | Caution advisory, last posted Jul 19, 2023. No all-clear recorded. |
| Venice / Alpine Drive | The state's latest record, from Nov 4, 2022, recommends no advisory. |
| Site 3 | The state's latest record, from Nov 4, 2022, recommends no advisory. |
| Emerald / Marconi East | The state's latest record, from Nov 4, 2022, recommends no advisory. |
| White Sands Drive | The state's latest record, from Nov 4, 2022, recommends no advisory. |
| Lucerne Court F | The state's latest record, from Nov 4, 2022, recommends no advisory. |
| Venice Drive | The state's latest record, from Oct 27, 2022, recommends no advisory. |
| Venice Marconi 6 | The state's latest record, from Oct 11, 2022, recommends no advisory. |
| Carson Court | Caution advisory, last posted Sep 21, 2022. No all-clear recorded. |
| Tahoe Keys Beach and Harbor | Caution advisory, last posted Sep 8, 2022. No all-clear recorded. |
| Traverse I | Caution advisory, last posted Aug 17, 2022. No all-clear recorded. |
| Slalom Court H | Caution advisory, last posted Aug 17, 2022. No all-clear recorded. |
| Spot not described | The state's latest record, from Jun 22, 2021, recommends no advisory. |
| Tahoe Keys Lagoon | Caution advisory, last posted Sep 25, 2020. No all-clear recorded. |
| Tahoe Keys West Channel Lagoons | Caution advisory, last posted Jun 4, 2018. No all-clear recorded. |
| Tahoe Keys West Channel Lagoons | The state's latest record, from Oct 20, 2017, recommends no advisory. |
Advisory history
Every advisory record the state has published for Tahoe Keys Lagoon, 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 13, 2026 | Traverse (Site I) | None | Advisory based on visual and toxins |
| Oct 13, 2026 | Venice Marconi (Site 6) | None | Advisory based on visual and toxins |
| Oct 13, 2026 | Venice Marconi (Site 6) | None | Advisory based on visual and toxins |
| Aug 21, 2026 | Slalom Court (Site H) | Caution | Advisory based on visual and toxins |
| Aug 21, 2026 | Traverse (Site I) | None | Advisory based on visual and toxins |
| Aug 21, 2026 | Slalom Court (Site H) | Caution | Advisory based on visual and toxins |
| Aug 21, 2026 | Venice Marconi (Site 6) | None | Advisory based on visual and toxins |
| Jun 23, 2026 | Venice Marconi (Site 6) | None | Advisory based on visual and toxins |
| Jun 23, 2026 | Slalom Court (Site H) | None | Advisory based on visual and toxins |
| Jun 23, 2026 | Traverse (Site I) | None | Advisory based on visual and toxins |
| Jun 11, 2026 | Marina by beginning of rubicon dock | None | Visual monitoring only-absent bloom |
| Oct 2, 2025 | Traverse (Site I) | None | Advisory based on visual and toxins |
| Oct 2, 2025 | Slalom Court (Site H) | None | Advisory based on visual and toxins |
| Oct 2, 2025 | Venice Marconi (Site 6) | None | Advisory based on visual and toxins |
| Aug 25, 2025 | Traverse (Site I) | Caution | Advisory based on visual and toxins |
| Aug 22, 2025 | Traverse (Site I) | Caution | Advisory based on visual and toxins |
| Aug 22, 2025 | Slalom Court (Site H) | None | Advisory based on visual and toxins |
| Aug 22, 2025 | Venice Marconi (Site 6) | Caution | Advisory based on visual and toxins |
| Aug 22, 2025 | Marina by beginning of rubicon dock | Caution | Testing results below posting triggers; Visual monitoring only-present bloom |
| Aug 18, 2025 | Venice Marconi (Site 6) | Caution | Advisory based on visual and toxins |
| Aug 18, 2025 | Site 18 | Caution | Updates from routine monitoring program-organization |
| Aug 14, 2025 | Marina by beginning of rubicon dock | Caution | Visual monitoring only-present bloom |
| Aug 14, 2025 | Marina by beginning of rubicon dock | Visual observation | Visual monitoring only-present bloom |
| Jul 24, 2025 | Marina by beginning of rubicon dock | None | Visual monitoring only-absent bloom |
| Jun 25, 2025 | Traverse (Site I) | None | Advisory based on visual and toxins |
| Jun 25, 2025 | Slalom Court (Site H) | None | Advisory based on visual and toxins |
| Jun 25, 2025 | Venice Marconi (Site 6) | None | Advisory based on visual and toxins |
| Aug 27, 2024 | Traverse (Site I) | None | Updates from routine monitoring program-organization |
| Aug 27, 2024 | Slalom Court (Site H) | None | Updates from routine monitoring program-organization |
| Aug 27, 2024 | Venice Marconi (Site 6) | Caution | Advisory based on visual and toxins |
| Jul 26, 2024 | Site 25 | Caution | Testing results below posting triggers; Visual monitoring only-present bloom |
| Jul 26, 2024 | Site 13 | Caution | Testing results below posting triggers; Visual monitoring only-present bloom |
| Jul 25, 2024 | Venice Alpine (634TKL008) | Warning | Advisory based on visual and toxins |
| Jul 25, 2024 | Traverse (Site I) | Caution | Under investigation; Visual monitoring only-present bloom |
| Jul 25, 2024 | Venice Alpine (634TKL008) | Warning | Advisory based on visual and toxins |
| Jul 12, 2024 | Emerald / Marconi West | Caution | Under investigation |
| Jul 12, 2024 | Slalom Court (Site H) | Caution | Under investigation |
| Jul 11, 2024 | Venice Alpine (634TKL008) | Caution | Visual monitoring only-present bloom |
| Jul 11, 2024 | Venice Alpine (634TKL008) | Caution | Visual monitoring only-present bloom |
| Jun 17, 2024 | Venice Marconi (Site 6) | Caution | Under investigation |
| Jun 17, 2024 | Traverse (Site I) | Caution | Under investigation |
| Jun 17, 2024 | Traverse (Site I) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jun 17, 2024 | Slalom Court (Site H) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jun 17, 2024 | Venice Marconi (Site 6) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 27, 2023 | Traverse (Site I) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 27, 2023 | Slalom Court (Site H) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 27, 2023 | Venice Marconi (Site 6) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 27, 2023 | Slalom Court (Site H) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 27, 2023 | Venice Marconi (Site 6) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 27, 2023 | Traverse (Site I) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 15, 2023 | Traverse (Site I) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 15, 2023 | Slalom Court (Site H) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 31, 2023 | Venice Marconi (Site 6) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 31, 2023 | Slalom Court (Site H) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 31, 2023 | Venice Marconi (Site 6) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 15, 2023 | Traverse (Site I) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 15, 2023 | Traverse (Site I) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 15, 2023 | Slalom Court (Site H) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 15, 2023 | Venice Marconi (Site 6) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 1, 2023 | Venice Marconi (Site 6) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 1, 2023 | Traverse (Site I) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 1, 2023 | Slalom Court (Site H) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jul 19, 2023 | Spinnaker Cove (Site 7) | Caution | Under investigation |
| Jul 19, 2023 | Traverse (Site I) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jul 19, 2023 | Slalom Court (Site H) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jul 19, 2023 | Spinnaker Cove (Site 7) | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jul 5, 2023 | Emerald / Marconi West | None | Updates from routine monitoring program-organization |
| Nov 4, 2022 | Venice / Alpine Drive | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Nov 4, 2022 | Site 3 | None | Updates from routine monitoring program-organization |
| Nov 4, 2022 | Emerald / Marconi East | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Nov 4, 2022 | Emerald / Marconi East | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Nov 4, 2022 | Site 3 | Warning | Updates from routine monitoring program-organization |
| Nov 4, 2022 | Venice / Alpine Drive | Danger | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Nov 4, 2022 | White Sands Drive | None | Advisory based on visual and toxins; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Nov 4, 2022 | Lucerne Court F | None | Testing results below posting triggers |
| Nov 4, 2022 | Lucerne Court F | None | Testing results below posting triggers |
| Oct 27, 2022 | Venice Drive | None | Updates from routine monitoring program-organization |
| Oct 27, 2022 | Venice Drive | None | Updates from routine monitoring program-organization |
| Oct 27, 2022 | Emerald / Marconi East | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 27, 2022 | Venice / Alpine Drive | Danger | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 27, 2022 | Venice Drive | None | Updates from routine monitoring program-organization |
| Oct 27, 2022 | White Sands Drive | None | Advisory based on visual and toxins; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 13, 2022 | Emerald / Marconi East | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 13, 2022 | Site 3 | Warning | Updates from routine monitoring program-organization |
| Oct 13, 2022 | Venice / Alpine Drive | Warning | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 13, 2022 | Venice Drive | None | Updates from routine monitoring program-organization |
| Oct 13, 2022 | White Sands Drive | None | Advisory based on visual and toxins; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 11, 2022 | Venice Marconi 6 | None | Testing results below posting triggers |
| Oct 11, 2022 | White Sands Drive | None | Advisory based on visual and toxins; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 11, 2022 | Venice Drive | None | Advisory based on visual and toxins |
| Sep 29, 2022 | Venice / Alpine Drive | Danger | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 29, 2022 | Venice Drive | Caution | Advisory based on visual and toxins |
| Sep 29, 2022 | White Sands Drive | None | Advisory based on visual and toxins; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 29, 2022 | Site 3 | Danger | Advisory based on visual and toxins |
| Sep 29, 2022 | Venice / Alpine Drive | Danger | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 22, 2022 | Lucerne Court F | None | Testing results below posting triggers |
| Sep 21, 2022 | Venice / Alpine Drive | Danger | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 21, 2022 | White Sands Drive | None | Advisory based on visual and toxins; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 21, 2022 | Carson Court | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 16, 2022 | White Sands Drive | None | Advisory based on visual and toxins; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 16, 2022 | Venice Drive | Caution | Advisory based on visual and toxins |
| Sep 16, 2022 | Venice / Alpine Drive | Warning | Advisory based on visual and toxins |
| Sep 15, 2022 | White Sands Drive | None | Advisory based on visual and toxins; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 15, 2022 | Carson Court | Caution | Advisory based on visual and toxins |
| Sep 14, 2022 | Site 3 | Warning | Advisory based on visual and toxins |
| Sep 14, 2022 | Site 3 | Warning | Advisory based on visual and toxins |
| Sep 8, 2022 | Tahoe Keys Beach and Harbor | Caution | Advisory based on visual and toxins |
| Sep 8, 2022 | Venice / Alpine Drive | Caution | Advisory based on visual and toxins |
| Aug 30, 2022 | Carson Court | Warning | Advisory based on visual and toxins |
| Aug 17, 2022 | Traverse I | Caution | visual monitoring based advisory |
| Aug 17, 2022 | Slalom Court H | Caution | visual monitoring based advisory |
| Aug 16, 2022 | Venice / Alpine Drive | Caution | Advisory based on visual and toxins |
| Aug 16, 2022 | Venice Drive | Caution | Advisory based on visual and toxins |
| Jul 19, 2022 | Traverse I | Caution | Advisory based on visual and toxins |
| Jul 19, 2022 | Slalom Court H | Caution | Advisory based on visual and toxins |
| Jun 14, 2022 | Venice Marconi 6 | None | No cyano bloom w/testing |
| Jun 22, 2021 | Spot not described | None | Testing results below posting triggers |
| Sep 25, 2020 | Tahoe Keys Lagoon | Caution | Advisory based on visual and toxins |
| Jun 4, 2018 | Tahoe Keys West Channel Lagoons | Caution | |
| Oct 20, 2017 | Tahoe Keys West Channel Lagoons | None |
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.