Lake Pillsbury: toxic algae advisories
Lake Pillsbury, Lake County. See all Lake County waters.
What the state's records say
Danger advisory, last posted Oct 19, 2026. No all-clear recorded.
6 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: Toxins may be at levels that can seriously harm people and animals. Stay out of the water and keep children and pets away from the water and the shore.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Lake Pillsbury
The state has an advisory on file for Lake Pillsbury (Danger advisory), last posted Oct 19, 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.
Satellite estimate (not an advisory)
Week ending Oct 17, 2026: about 940,000 cells/mL of cyanobacteria near the center of Lake Pillsbury.
A satellite estimate from EPA CyAN for a 7.9 km² lake. It does not measure toxins and does not change the advisory status.
| Week ending | Estimate |
|---|---|
| Oct 17, 2026 | about 940,000 cells/mL |
| Oct 10, 2026 | about 910,000 cells/mL |
| Oct 3, 2026 | about 1,200,000 cells/mL |
| Sep 26, 2026 | about 470,000 cells/mL |
| Sep 19, 2026 | about 390,000 cells/mL |
| Sep 12, 2026 | about 480,000 cells/mL |
| Sep 5, 2026 | about 150,000 cells/mL |
| Aug 29, 2026 | about 17,000 cells/mL |
This is a satellite estimate from the U.S. EPA's Cyanobacteria Assessment Network, not an advisory. It estimates how much cyanobacteria is in the water near the lake's center, not whether toxins are present: a high number does not mean toxins, and a low one does not mean there are none. It covers lakes of about 1 square kilometer and larger, so small ponds, dog parks and most rivers are not covered, and clouds can hide a lake for weeks. It never changes the advisory status above.
Satellite estimates: U.S. EPA Cyanobacteria Assessment Network (CyAN), from Copernicus Sentinel-3 data. Provisional, research-level estimates; EPA does not endorse this site. Checked Oct 22, 2026.
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 Pine Point and Sunset Boat Launches | Danger advisory, last posted Oct 19, 2026. No all-clear recorded. |
| Resort | Danger advisory, last posted Oct 16, 2026. No all-clear recorded. |
| Pine Point | Algal mat general awareness sign, last posted Jul 1, 2025. No all-clear recorded. |
| Resort | Caution advisory, last posted Nov 21, 2022. No all-clear recorded. |
| Resort | Caution advisory, last posted Jul 6, 2021. No all-clear recorded. |
| Pine Point | Caution advisory, last posted Jul 6, 2021. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Lake Pillsbury, 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 |
|---|---|---|---|
| Oct 19, 2026 | near Pine Point and Sunset Boat Launches | Danger | Advisory based on visual and toxins |
| Oct 19, 2026 | near Pine Point and Sunset Boat Launches | Caution | Advisory based on visual and toxins |
| Oct 16, 2026 | Resort | Danger | Advisory based on visual and toxins; Alert-high concentration toxins; Floating/planktonic bloom observed |
| Sep 22, 2026 | near Pine Point and Sunset Boat Launches | Caution | Advisory based on visual and toxins |
| Sep 22, 2026 | Resort | Danger | Advisory based on visual and toxins; Alert-high concentration toxins; Floating/planktonic bloom observed |
| Aug 31, 2026 | Resort | Danger | Advisory based on visual and toxins; Alert-high concentration toxins; Floating/planktonic bloom observed |
| Aug 27, 2026 | near Pine Point and Sunset Boat Launches | Caution | Advisory based on visual and toxins |
| Aug 25, 2026 | Resort | Caution | Floating/planktonic bloom observed; Visual monitoring only-present bloom |
| Aug 3, 2026 | near Pine Point and Sunset Boat Launches | Caution | Suspected bloom, investigation ongoing; Suspected illness reported |
| Jun 26, 2026 | Resort | None | No cyano bloom w/testing; Testing results below posting triggers |
| May 18, 2026 | Resort | None | Testing results below posting triggers |
| May 18, 2026 | Resort | General awareness | Testing results below posting triggers |
| Oct 22, 2025 | Resort | Warning | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory |
| Aug 27, 2025 | Resort | Caution | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory |
| Jul 1, 2025 | Pine Point | Algal mat general awareness sign | Updates from routine monitoring program-organization; Visual monitoring only-absent bloom |
| Jul 1, 2025 | Resort | General awareness | Rec algal mat general awareness; Testing results below posting triggers |
| Jul 1, 2025 | Pine Point | None | Updates from routine monitoring program-organization; Visual monitoring only-absent bloom |
| Jul 1, 2025 | Pine Point | None | Updates from routine monitoring program-organization; Visual monitoring only-absent bloom |
| May 19, 2025 | Resort | General awareness | Rec algal mat general awareness; Testing results below posting triggers |
| May 13, 2025 | Pine Point | Algal mat alert sign | Alert-detached mats observed; Bottom/benthic bloom observed |
| May 13, 2025 | Pine Point | Algal mat alert sign | Alert-detached mats observed; Bottom/benthic bloom observed |
| May 13, 2025 | Pine Point | Algal mat alert sign | Alert-detached mats observed; Bottom/benthic bloom observed; Under investigation |
| May 13, 2025 | Pine Point | Algal mat alert sign | Bottom/benthic bloom observed; Visual monitoring only-present bloom |
| Dec 5, 2024 | Resort | None | End date recorded: Dec 5, 2024. De-posting advisory. |
| Dec 5, 2024 | Resort | None | De-posting advisory. |
| Dec 5, 2024 | Resort | None | De-posting advisory. |
| Oct 25, 2024 | Resort | Danger | Advisory based on visual and toxins; Alert-high concentration toxins; Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Aug 28, 2024 | Resort | Caution | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Jun 26, 2024 | Resort | None | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 26, 2024 | Resort | None | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 26, 2024 | Resort | None | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| May 10, 2024 | Resort | None | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Oct 19, 2023 | Resort | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Aug 24, 2023 | Resort | Caution | Lake-wide advisory; Updates from routine monitoring program-organization |
| Jun 23, 2023 | Resort | None | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| May 24, 2023 | Resort | None | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| May 24, 2023 | Resort | None | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Nov 21, 2022 | Resort | Caution | Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Nov 21, 2022 | Resort | Caution | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Oct 12, 2022 | Resort | Caution | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 14, 2022 | Resort | Caution | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 14, 2022 | Resort | Caution | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Jun 30, 2022 | Resort | Warning | Lake-wide advisory |
| May 25, 2022 | Resort | Warning | Lake-wide advisory |
| May 25, 2022 | Resort | Warning | Lake-wide advisory |
| Jul 6, 2021 | Resort | Caution | Advisory based on visual and toxins |
| Jul 6, 2021 | Pine Point | Caution | 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.