Machado Lake: toxic algae advisories
Machado Lake, Los Angeles County. See all Los Angeles County waters.
What the state's records say
Caution advisory, last posted Aug 26, 2024. No all-clear recorded.
3 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 Machado Lake
The state has an advisory on file for Machado Lake (Caution advisory), last posted Aug 26, 2024, 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 |
|---|---|
| near playground | The state's latest record, from Aug 24, 2026, recommends no advisory. |
| Boat ramp | Caution advisory, last posted Aug 26, 2024. No all-clear recorded. |
| Spot not described | Caution advisory, last posted Jul 30, 2021. No all-clear recorded. |
| Machado Lake, at boat ramp | Caution advisory, last posted Aug 31, 2020. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Machado 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 24, 2026 | near playground | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jun 30, 2026 | near playground | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| May 18, 2026 | near playground | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 22, 2025 | near playground | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jun 30, 2025 | near playground | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| May 15, 2025 | near playground | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 26, 2024 | Boat ramp | Caution | Updates from routine monitoring program-organization |
| Aug 26, 2024 | near playground | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jun 28, 2024 | near playground | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| May 20, 2024 | near playground | None | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jul 30, 2021 | Spot not described | Caution | Advisory based on visual and toxins |
| Aug 31, 2020 | Machado Lake, at boat ramp | Caution | visual monitoring based advisory |
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.