Toxic algae in Nevada County, California
24 lakes and waterways have harmful algal bloom reports in California's official data.
Lakes with bloom history
| Lake | Years with reports | Most recent |
|---|---|---|
| Little Truckee River | 3 | 2024 |
| Prosser Reservoir | 2 | 2026 |
| Martis Creek Reservoir | 3 | 2026 |
| Prosser Creek | 3 | 2023 |
| Boca Reservoir | 2 | 2023 |
| Combie Lake | 2 | 2026 |
| Donner Lake | 2 | 2022 |
| Summit Lake | 2 | 2022 |
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.
- Crabtree Creek (2026)
- Flora Lake (2022)
- Lake Angela (2022)
- Lake Of The Pines (2026)
- Lake Wildwood (2024)
- Lake Zyac (2026)
- Little Dry Creek (2023)
- Middle Fork American River (2025)
- Other Lake Or Reservoir (2020)
- Pond On Marin Pl (2026)
- Prosser Creek Reservoir (2023)
- Sagehen Creek (2026)
- Scotts Flat Lake (2022)
- South Fork Yuba River (2023)
- South Yuba River (2026)
- Trout Creek (2022)
Source: California State Water Resources Control Board, official data. For current conditions see the California HABs Portal map.