Toxic algae in Napa County, California
9 lakes and waterways have harmful algal bloom reports in California's official data.
Lakes with bloom history
| Lake | Years with reports | Most recent |
|---|---|---|
| Lake Berryessa | 5 | 2026 |
| Huichica Creek | 3 | 2021 |
| Huichica Pond | 2 | 2022 |
| Redwood Creek | 2 | 2024 |
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.
- Bell Canyon Reservoir (2026)
- Capell Creek (2019)
- Lake Hennessey (2024)
- Other River (2017)
- Tulucay Creek (2024)
Source: California State Water Resources Control Board, official data. For current conditions see the California HABs Portal map.