California Aqueduct: toxic algae advisories

California Aqueduct, Merced County. See all Merced County waters.

What the state's records say

Reports on file, with no advisory level the state has classified.

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 California Aqueduct

The state has reports on file for California Aqueduct but has not classified an advisory level, so the records cannot answer this. Keep your dog out of discolored or scummy water.

More on dogs and toxic algae.

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 California Aqueduct and its latest status
SpotStatus
VA Cemetery Turnout; California Aqueduct Mile Point 66.12 (Station 3494+01.5) Reports on file, with no advisory level the state has classified.

Advisory history

Every advisory record the state has published for California Aqueduct, 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 California Aqueduct, newest first
DateSpotState's levelNotes
Jul 8, 2025 VA Cemetery Turnout; California Aqueduct Mile Point 66.12 (Station 3494+01.5) NA - refer to Report Details No cyano bloom w/photos; Under investigation

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.