Stafford Lake: toxic algae advisories
Stafford Lake, Marin County. See all Marin County waters.
What the state's records say
Warning advisory, last posted Oct 9, 2026. 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: Toxins may be at levels that can harm people and animals. Do not swim or let children or pets in the water, and stay away from scum.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Stafford Lake
The state has an advisory on file for Stafford Lake (Warning advisory), last posted Oct 9, 2026, 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 |
|---|---|
| stafford lake park | General awareness, last posted Oct 9, 2026. No all-clear recorded. |
| City of Novato | Warning advisory, last posted Sep 10, 2021. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Stafford Lake, 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 |
|---|---|---|---|
| Oct 9, 2026 | stafford lake park | General awareness | Suspected bloom, investigation ongoing |
| Sep 10, 2021 | City of Novato | Warning | Advisory based on visual and toxins |
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.