Lake Clementine: toxic algae advisories
Lake Clementine, Placer County. See all Placer County waters.
What the state's records say
Caution advisory, last posted Sep 24, 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 Lake Clementine
The state has an advisory on file for Lake Clementine (Caution advisory), last posted Sep 24, 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 |
|---|---|
| Upper Lake Clementine Beach | Algal mat alert sign, last posted Sep 24, 2024. No all-clear recorded. |
| Lower Lake Clementine | Caution advisory, last posted Mar 29, 2022. No all-clear recorded. |
| Beach | Caution advisory, last posted Sep 3, 2021. No all-clear recorded. |
| Campground | The state's latest record, from Sep 3, 2021, recommends no advisory. |
| upper day use area/beach | The state's latest record, from May 25, 2021, recommends no advisory. |
| lower lake boat launch | The state's latest record, from May 25, 2021, recommends no advisory. |
Advisory history
Every advisory record the state has published for Lake Clementine, 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 24, 2024 | Upper Lake Clementine Beach | Algal mat alert sign | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 25, 2024 | Upper Lake Clementine Beach | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 10, 2023 | Upper Lake Clementine Beach | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 1, 2023 | Upper Lake Clementine Beach | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 21, 2023 | Upper Lake Clementine Beach | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 30, 2022 | Upper Lake Clementine Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| Sep 2, 2022 | Upper Lake Clementine Beach | Algal mat alert sign | Bottom/benthic bloom observed; Posted algal mat general awareness; Updates from routine monitoring program-organization |
| Aug 24, 2022 | Upper Lake Clementine Beach | Algal mat general awareness sign | Rec algal mat general awareness; Updates from routine monitoring program-organization |
| Aug 3, 2022 | Upper Lake Clementine Beach | Algal mat alert sign | Bottom/benthic bloom observed |
| Jul 21, 2022 | Upper Lake Clementine Beach | Algal mat alert sign | Bottom/benthic bloom observed |
| Jul 8, 2022 | Upper Lake Clementine Beach | Algal mat alert sign | Bottom/benthic bloom observed |
| Jul 6, 2022 | Upper Lake Clementine Beach | None | No cyano bloom w/testing |
| Jun 17, 2022 | Upper Lake Clementine Beach | None | No cyano bloom w/testing |
| May 25, 2022 | Upper Lake Clementine Beach | None | No cyano bloom w/testing |
| Mar 29, 2022 | Lower Lake Clementine | Caution | Bottom/benthic bloom observed |
| Sep 3, 2021 | Beach | Caution | Advisory based on visual and toxins |
| Sep 3, 2021 | Campground | None | Testing results below posting triggers |
| May 25, 2021 | upper day use area/beach | None | Testing results below posting triggers |
| May 25, 2021 | lower lake boat launch | 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.