Toxic algae in Butte County, California
12 lakes and waterways have harmful algal bloom reports in California's official data.
Lakes with bloom history
| Lake | Years with reports | Most recent |
|---|---|---|
| Lake Oroville | 10 | 2026 |
| Butte Creek | 2 | 2026 |
| Horseshoe Lake | 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 Chico Creek (2024)
- California Park Lake (2016)
- Clear Creek (2021)
- Concow Creek (2021)
- Dry Creek (2021)
- Feather River (2026)
- Fish Creek (2026)
- Phantom Falls Creek (2023)
- Private Pond (2025)
Source: California State Water Resources Control Board, official data. For current conditions see the California HABs Portal map.