American River: toxic algae advisories

American River, Placer County. See all Placer County waters.

What the state's records say

Caution advisory, last posted May 25, 2021. 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: Algae that can make toxins may be present. Keep people, children and pets away from algae and scum, and do not let pets drink the water.

Before you go, check the state's official algae page and any signs posted at the water.

Dogs at American River

The state has an advisory on file for American River (Caution advisory), last posted May 25, 2021, 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:

Each reported spot at American River and its latest status
Spot	Status
Oregon Bar, North Fork	Caution advisory, last posted May 25, 2021. No all-clear recorded.
confluence of North and Middle Forks (popular swimming area)	The state's latest record, from May 25, 2021, recommends no advisory.

Advisory history

Every advisory record the state has published for American River, 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 American River, newest first
Date	Spot	State's level	Notes
May 25, 2021	Oregon Bar, North Fork	Caution	Advisory based on visual and toxins
May 25, 2021	confluence of North and Middle Forks (popular swimming area)	None	Testing results below posting triggers

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.