California
Toxic algae in Solano County lakes
6 lakes and waterways in Solano County have harmful algal bloom reports in California's official data. The most recent entry is for Lake Herman: There are no bloom reports for Lake Herman in the last 30 days of California's data. The most recent was a Caution advisory on 6 October 2024 at Lake herman.
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.
- Barka Slough 2017
- Cache Slough 2021
- Lake Solano 2022
- Vallejo White Slough 2026
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.