Toxic algae in Santa Cruz County, California
13 lakes and waterways have harmful algal bloom reports in California's official data.
Lakes with bloom history
| Lake | Years with reports | Most recent |
|---|---|---|
| Pinto Lake | 9 | 2025 |
| Corcoran Lagoon | 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.
- College Lake (2025)
- Drew Lake (2025)
- Kelley Lake (2016)
- Kelly Lake (2025)
- Moran Lagoon (2025)
- Pine Lake (2017)
- San Lorenzo River Estuary (2015)
- Santa Cruz Harbor (2020)
- Schwan Lake (2025)
- Tynan Lake (2020)
- Valencia Creek (2024)
Source: California State Water Resources Control Board, official data. For current conditions see the California HABs Portal map.