San Francisco Bay, South: toxic algae advisories
San Francisco Bay, South, Alameda County. See all Alameda County waters.
What the state's records say
The state recorded an end date of Oct 14, 2022.
Last advisory on file: Aug 25, 2022.
That reflects what the state knew on that date. It is not a finding that the water is safe now: blooms can return within days, and many are never reported.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at San Francisco Bay, South
The state recorded an end date of Oct 14, 2022. For San Francisco Bay, South, that is not the same as an all-clear for today. Look at the water before your dog goes in: keep it out of green, blue-green or scummy water and away from mats on the shore.
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 |
|---|---|
| South San Francisco Bay Dumbarton Bridge | The state recorded an end date of Oct 14, 2022. |
Advisory history
Every advisory record the state has published for San Francisco Bay, South, 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 |
|---|---|---|---|
| Aug 25, 2022 | South San Francisco Bay Dumbarton Bridge | Caution | End date recorded: Oct 14, 2022. Marine bloom present (red tide) |
| Aug 25, 2022 | South San Francisco Bay Dumbarton Bridge | Caution | Marine bloom present (red tide) |
| Aug 25, 2022 | South San Francisco Bay Dumbarton Bridge | Caution | Suspected bloom, investigation ongoing; Suspected illness reported |
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.