Toxic algae in Colusa County, California
3 lakes and waterways have harmful algal bloom reports in California's official data.
Lakes with bloom history
| Lake | Years with reports | Most recent |
|---|---|---|
| East Park Reservoir | 3 | 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.
- Little Stony Creek (2022)
- Stoney Creek (2022)
Source: California State Water Resources Control Board, official data. For current conditions see the California HABs Portal map.