Toxic algae in Calaveras County, California
10 lakes and waterways have harmful algal bloom reports in California's official data.
Lakes with bloom history
| Lake | Years with reports | Most recent |
|---|---|---|
| Lake Tulloch | 1 | 2026 |
| Salt Spring Valley Reservoir | 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.
- Esperanza Creek (2022)
- Lake Tullock (2026)
- Maxwell Creek (2021)
- New Hogan Reservoir (2019)
- Other River (2019)
- Tulloch Lake (2026)
- Tulloch Reservoir (2026)
- White Pines Lake (2018)
Source: California State Water Resources Control Board, official data. For current conditions see the California HABs Portal map.