Summit Lake: toxic algae advisories

Summit Lake, Nevada County. See all Nevada County waters.

What the state's records say

The state's latest record, from Sep 30, 2022, recommends no advisory.

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 Summit Lake

The state's latest record, from Sep 30, 2022, recommends no advisory. For Summit Lake, 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 Summit Lake and its latest status
Spot	Status
South Shore Across from Large Rock	The state's latest record, from Sep 30, 2022, recommends no advisory.
Spot not described	The state's latest record, from Jun 11, 2021, recommends no advisory.

Advisory history

Every advisory record the state has published for Summit Lake, 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 Summit Lake, newest first
Date	Spot	State's level	Notes
Sep 30, 2022	South Shore Across from Large Rock	None	No cyano, other algae present.
Aug 24, 2022	South Shore Across from Large Rock	None	No cyano, other algae present.
Jul 5, 2022	South Shore Across from Large Rock	None	No cyano, other algae present.
Jun 11, 2021	Spot not described	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.