California
Toxic algae in Imperial County lakes
6 lakes and waterways in Imperial County have harmful algal bloom reports in California's official data. The most recent entry is for Salton Sea: There are no bloom reports for Salton Sea in the last 30 days of California's data. The most recent was a bloom report on 16 September 2026 at East pond along north berm. Salton Sea and Wiest Lake have had blooms in three or more years.
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.
- Palo Verde Lagoon 2025
- Sunbeam Lake 2022
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.