San Francisco Bay, Central: toxic algae advisories
San Francisco Bay, Central, Alameda County. See all Alameda County waters.
What the state's records say
Visual observation, last posted Aug 1, 2023. No all-clear recorded.
2 reported spots here have an advisory with no all-clear recorded.
Reporting is voluntary, so the state may not have recorded an end even if conditions changed. Check posted signs and the official map.
What this level asks: The state recorded an advisory of a type outside the Caution, Warning and Danger levels. Read the sign posted at the water.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at San Francisco Bay, Central
The state has an advisory on file for San Francisco Bay, Central (Visual observation), last posted Aug 1, 2023, and no all-clear recorded. Keep your dog out of the water and away from scum on the shore until the state records an end.
Reported spots
The state records each report at a spot, such as a beach or a boat ramp. Each spot's latest deciding record:
| Spot | Status |
|---|---|
| Emeryville Marina | Reports on file, with no advisory level the state has classified. |
| Emeryville | Visual observation, last posted Aug 1, 2023. No all-clear recorded. |
| Berkeley Marina | Visual observation, last posted Aug 1, 2023. No all-clear recorded. |
Advisory history
Every advisory record the state has published for San Francisco Bay, Central, newest first. "None" is the state's record that no advisory was recommended on that date. "NA" records do not change a status.
| Date | Spot | State's level | Notes |
|---|---|---|---|
| Jul 3, 2024 | Emeryville Marina | NA - refer to Report Details | Marine bloom suspected (red tide); Under investigation |
| Jul 3, 2024 | Emeryville Marina | NA - refer to Report Details | Marine bloom suspected (red tide); Under investigation |
| Aug 1, 2023 | Emeryville | NA - refer to Report Details | Marine bloom suspected (red tide) |
| Aug 1, 2023 | Emeryville | Visual observation | Marine bloom present (red tide) |
| Aug 1, 2023 | Berkeley Marina | Visual observation | Marine bloom present (red tide) |
| Aug 1, 2023 | Berkeley Marina | Visual observation | Marine bloom present (red tide) |
| Jul 31, 2023 | Berkeley Marina | Visual observation | Marine bloom present (red tide) |
| Jul 31, 2023 | Berkeley Marina | NA - refer to Report Details | Marine bloom present (red tide) |
| Jul 31, 2023 | Berkeley Marina | NA - refer to Report Details | Marine bloom suspected (red tide) |
Source
Advisory data: California State Water Resources Control Board, Freshwater Harmful Algal Bloom Program, via data.ca.gov (public domain). Advisories are recommendations; reporting is voluntary and incomplete. The state's data. An advisory ends only when the state records a later "None" (no advisory recommended) at the same spot, or an end date. A blank end date is unknown.