Humboldt Bay: toxic algae advisories

Humboldt Bay, Humboldt County. See all Humboldt County waters.

What the state's records say

The state's latest record, from Aug 16, 2023, recommends no advisory.

Last advisory on file: Aug 10, 2023.

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 Humboldt Bay

The state's latest record, from Aug 16, 2023, recommends no advisory. For Humboldt Bay, 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:

Each reported spot at Humboldt Bay and its latest status
Spot	Status
King Salmon Beach	The state's latest record, from Aug 16, 2023, recommends no advisory.

Advisory history

Every advisory record the state has published for Humboldt Bay, newest first. "None" is the state's record that no advisory was recommended on that date. "NA" records do not change a status.

Advisory records for Humboldt Bay, newest first
Date	Spot	State's level	Notes
Aug 16, 2023	King Salmon Beach	None	Visual monitoring only-absent bloom
Aug 10, 2023	King Salmon Beach	Caution	Marine bloom present, non-toxic (red tide)
Aug 8, 2023	King Salmon Beach	Caution	Marine bloom suspected (red tide); Under investigation; visual monitoring based advisory
Aug 8, 2023	King Salmon Beach	Caution	Marine bloom suspected (red tide); Under investigation; visual monitoring based advisory

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.