San Francisco County: lake and river algae advisories
5 waters in San Francisco County appear in the state's harmful algal bloom records. Waters whose latest record is an advisory come first.
| Water | Latest record |
|---|---|
| Chrissy Field Marsh | Algal mat alert sign, last posted Aug 28, 2024. No all-clear recorded. |
| Lake Merced | Danger advisory, last posted Jun 27, 2024. No all-clear recorded. |
| San Francisco Bay, Central | Caution advisory, last posted Aug 25, 2023. No all-clear recorded. |
| Spreckels Lake | Caution advisory, last posted Nov 14, 2024. No all-clear recorded. |
| San Francisco Bay | Reports on file, with no advisory level the state has classified. |