Santee Lakes: toxic algae advisories
Santee Lakes, San Diego County. See all San Diego County waters.
What the state's records say
Warning advisory, last posted Dec 18, 2025. 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 Santee Lakes
The state has an advisory on file for Santee Lakes (Warning advisory), last posted Dec 18, 2025, 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 |
|---|---|
| Santee Lake #7 near campground | Warning advisory, last posted Dec 18, 2025. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Santee Lakes, 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 |
|---|---|---|---|
| Dec 18, 2025 | Santee Lake #7 near campground | Warning | Advisory based on visual and toxins |
| Sep 17, 2025 | Santee Lake #7 near campground | Warning | Advisory based on visual and toxins |
| Aug 30, 2024 | Santee Lake #7 near campground | Warning | Advisory based on visual and toxins |
| Jul 23, 2024 | Santee Lake #7 near campground | Warning | Advisory based on visual and toxins |
| Jul 15, 2024 | Santee Lake #7 near campground | 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.