California
Toxic algae in Yuba County lakes
9 lakes and waterways in Yuba County have harmful algal bloom reports in California's official data. The most recent entry is for New Bullards Bar Reservoir: There are no bloom reports for New Bullards Bar Reservoir in the last 30 days of California's data. The most recent was a bloom report on 16 September 2026 at New Bullards Bar Dam.
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.
- Collier Canyon Creek 2019
- Dry Creek 2020
- Ellis Lake 2026
- Englebright Lake 2019
- Lake Ellis 2026
- Lake Mildred 2020
- North Yuba River 2026
- Prairie Creek 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.