Legg Lake: toxic algae advisories
Legg Lake, Los Angeles County. See all Los Angeles County waters.
What the state's records say
Caution advisory, last posted Aug 27, 2026. No all-clear recorded.
2 reported spots here have an advisory with 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 Legg Lake
The state has an advisory on file for Legg Lake (Caution advisory), last posted Aug 27, 2026, 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 |
|---|---|
| Center lake - Whittier Narrows Recreation Area | Caution advisory, last posted Aug 27, 2026. No all-clear recorded. |
| North lake, east side-Whittier Narrows Recreational Area | Caution advisory, last posted Sep 18, 2024. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Legg Lake, 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 |
|---|---|---|---|
| Aug 27, 2026 | Center lake - Whittier Narrows Recreation Area | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Jun 24, 2026 | Center lake - Whittier Narrows Recreation Area | None | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| May 14, 2026 | Center lake - Whittier Narrows Recreation Area | None | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Aug 20, 2025 | Center lake - Whittier Narrows Recreation Area | None | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Jun 18, 2025 | Center lake - Whittier Narrows Recreation Area | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| May 15, 2025 | Center lake - Whittier Narrows Recreation Area | Warning | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 18, 2024 | Center lake - Whittier Narrows Recreation Area | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 18, 2024 | North lake, east side-Whittier Narrows Recreational Area | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 18, 2024 | Center lake - Whittier Narrows Recreation Area | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 18, 2024 | North lake, east side-Whittier Narrows Recreational Area | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Aug 21, 2024 | Center lake - Whittier Narrows Recreation Area | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Aug 21, 2024 | North lake, east side-Whittier Narrows Recreational Area | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Jun 13, 2024 | North lake, east side-Whittier Narrows Recreational Area | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Jun 13, 2024 | Center lake - Whittier Narrows Recreation Area | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| May 13, 2024 | Center lake - Whittier Narrows Recreation Area | None | Updates from routine monitoring program-organization |
| May 13, 2024 | North lake, east side-Whittier Narrows Recreational Area | None | Updates from routine monitoring program-organization |
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.