California
Toxic algae in Santa Barbara County lakes
8 lakes and waterways in Santa Barbara County have harmful algal bloom reports in California's official data. The most recent entry is for Cachuma Creek: There are no bloom reports for Cachuma Creek in the last 30 days of California's data. The most recent was a Caution advisory on 10 June 2019 at Lake Cachuma.
Lakes with bloom history
Newest report first. Each lake has its own page with the full history and what the results mean.
Other waterbodies with a report
These have one or two reports in a single year, which isn't enough history for a page of their own yet.
- Alamo Pintado Creek 2023
- Fish Creek 2026
- Paradise Creek 2026
- Private Pond 2026
- San Ysidro Creek 2023
- Santa Ynez River 2022
- Zaca Lake 2017
Source: California State Water Resources Control Board, official data, checked 24 October 2026. For today's conditions see the California HABs Portal map. No report doesn't mean a lake is safe: most water is only tested occasionally.