Canyon Lake: toxic algae advisories
Canyon Lake, Riverside County. See all Riverside County waters.
What the state's records say
Caution advisory, last posted Sep 2, 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 Canyon Lake
The state has an advisory on file for Canyon Lake (Caution advisory), last posted Sep 2, 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 |
|---|---|
| Causeway between backwater and Canyon Lake | Caution advisory, last posted Sep 2, 2026. No all-clear recorded. |
| central lake area | Visual observation, last posted Jun 6, 2025. No all-clear recorded. |
| Moonstone Beach | The state's latest record, from Nov 4, 2022, recommends no advisory. |
| East Port Boat launch | The state's latest record, from Nov 4, 2022, recommends no advisory. |
| Canyon Lake Happy Camp Campground Swim Beach | The state's latest record, from Sep 2, 2022, recommends no advisory. |
| Canyon Lake Sunset Beach | The state's latest record, from Sep 2, 2022, recommends no advisory. |
| Canyon Lake-Vacation Drive-Causeway South | The state's latest record, from Oct 2, 2020, recommends no advisory. |
| Canyon Lake East Port Park | The state's latest record, from Oct 2, 2020, recommends no advisory. |
| Canyon Lake-Vacation Drive-Causeway North | The state's latest record, from Oct 2, 2020, recommends no advisory. |
| Canyon Lake-Sunset Beach-Swim Beach | The state's latest record, from Oct 2, 2020, recommends no advisory. |
| Canyon Lake-Roadrunner Park-Swim Beach | The state's latest record, from Oct 2, 2020, recommends no advisory. |
| Spot not described | The state's latest record, from Sep 19, 2016, recommends no advisory. |
Advisory history
Every advisory record the state has published for Canyon 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 |
|---|---|---|---|
| Sep 2, 2026 | Causeway between backwater and Canyon Lake | Caution | Advisory based on visual and toxins |
| Jul 1, 2026 | Causeway between backwater and Canyon Lake | General awareness | Rec general awareness; Testing results below posting triggers |
| Jun 6, 2025 | central lake area | Visual observation | Suspected bloom, investigation ongoing; Suspected illness reported |
| Aug 1, 2023 | Causeway between backwater and Canyon Lake | Visual observation | Under investigation; Visual monitoring only-present bloom |
| Nov 4, 2022 | Moonstone Beach | None | Advisory based on visual and toxins |
| Nov 4, 2022 | East Port Boat launch | None | Advisory based on visual and toxins |
| Sep 2, 2022 | Canyon Lake Happy Camp Campground Swim Beach | None | Testing results below posting triggers |
| Sep 2, 2022 | Canyon Lake Sunset Beach | None | Testing results below posting triggers |
| May 13, 2022 | Canyon Lake Happy Camp Campground Swim Beach | None | Testing results below posting triggers |
| May 13, 2022 | Canyon Lake Sunset Beach | None | Testing results below posting triggers |
| Oct 2, 2020 | Canyon Lake-Vacation Drive-Causeway South | None | Testing results below posting triggers |
| Oct 2, 2020 | Canyon Lake East Port Park | None | Testing results below posting triggers |
| Oct 2, 2020 | Canyon Lake-Vacation Drive-Causeway North | None | Testing results below posting triggers |
| Oct 2, 2020 | Canyon Lake-Sunset Beach-Swim Beach | None | Testing results below posting triggers |
| Oct 2, 2020 | Canyon Lake-Roadrunner Park-Swim Beach | None | Testing results below posting triggers |
| Sep 19, 2016 | Spot not described | None |
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.