Toxic algae in Mendocino County, California
17 lakes and waterways have harmful algal bloom reports in California's official data.
Lakes with bloom history
| Lake | Years with reports | Most recent |
|---|---|---|
| Gualala River | 3 | 2022 |
| East Fork Russian River | 3 | 2025 |
| Lake Mendocino | 4 | 2025 |
| Eel River | 3 | 2026 |
| Russian River | 2 | 2025 |
Other waterbodies with a report
These have one or two reports in a single year, so there isn't enough history for a page of their own yet.
- Big River Hydrologic Area (2021)
- Cahto Creek (2024)
- Lake Emily (2026)
- Lily Pond (2022)
- Little River (2023)
- Long Valley Creek (2026)
- Mill Creek (2021)
- Mill Creek Hydrologic Subarea (2022)
- North Fork Eel River Hydrologic Area (2021)
- Pudding Creek (2022)
- Trout Creek (2022)
- Upper Mill Creek Pond (2025)
Source: California State Water Resources Control Board, official data. For current conditions see the California HABs Portal map.