Lake Webb: toxic algae advisories
Lake Webb, Kern County. See all Kern County waters.
What the state's records say
The state's latest record, from May 15, 2026, recommends no advisory.
That reflects what the state knew on that date. It is not a finding that the water is safe now: blooms can return within days, and many are never reported.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Lake Webb
The state's latest record, from May 15, 2026, recommends no advisory. For Lake Webb, that is not the same as an all-clear for today. Look at the water before your dog goes in: keep it out of green, blue-green or scummy water and away from mats on the shore.
Satellite estimate (not an advisory)
Week ending Oct 17, 2026: about 620,000 cells/mL of cyanobacteria near the center of Lake Webb.
A satellite estimate from EPA CyAN for a 3.5 km² lake. It does not measure toxins and does not change the advisory status.
| Week ending | Estimate |
|---|---|
| Oct 17, 2026 | about 620,000 cells/mL |
| Oct 10, 2026 | about 460,000 cells/mL |
| Oct 3, 2026 | about 420,000 cells/mL |
| Sep 26, 2026 | about 460,000 cells/mL |
| Sep 19, 2026 | about 440,000 cells/mL |
| Sep 12, 2026 | about 360,000 cells/mL |
| Sep 5, 2026 | about 470,000 cells/mL |
| Aug 29, 2026 | about 350,000 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 |
|---|---|
| Buena Vista Aquatic Recreational Area (Central) | The state's latest record, from May 15, 2026, recommends no advisory. |
| East Boat Ramp (East) | The state's latest record, from May 15, 2026, recommends no advisory. |
| West Boat Ramp (West) | The state's latest record, from May 15, 2026, recommends no advisory. |
| Lake Webb (Buena Vista) | The state's latest record, from Dec 4, 2018, recommends no advisory. |
| BUENA VISTA LAKE SITE 2 | The state's latest record, from Jan 3, 2018, recommends no advisory. |
Advisory history
Every advisory record the state has published for Lake Webb, 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 |
|---|---|---|---|
| May 15, 2026 | Buena Vista Aquatic Recreational Area (Central) | None | Testing results below posting triggers |
| May 15, 2026 | East Boat Ramp (East) | None | Testing results below posting triggers |
| May 15, 2026 | West Boat Ramp (West) | None | Testing results below posting triggers |
| May 14, 2025 | Buena Vista Aquatic Recreational Area (Central) | None | Testing results below posting triggers |
| May 14, 2025 | East Boat Ramp (East) | None | Testing results below posting triggers |
| May 14, 2025 | West Boat Ramp (West) | None | Testing results below posting triggers |
| Nov 13, 2024 | Buena Vista Aquatic Recreational Area (Central) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Nov 13, 2024 | East Boat Ramp (East) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Nov 13, 2024 | West Boat Ramp (West) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| May 14, 2024 | East Boat Ramp (East) | None | Updates from routine monitoring program-organization |
| May 14, 2024 | Buena Vista Aquatic Recreational Area (Central) | None | Updates from routine monitoring program-organization |
| May 14, 2024 | West Boat Ramp (West) | None | Updates from routine monitoring program-organization |
| Aug 22, 2023 | West Boat Ramp (West) | None | Testing results below posting triggers |
| Aug 22, 2023 | Buena Vista Aquatic Recreational Area (Central) | None | Testing results below posting triggers |
| Aug 22, 2023 | East Boat Ramp (East) | None | Testing results below posting triggers |
| Aug 22, 2023 | East Boat Ramp (East) | None | Testing results below posting triggers |
| Aug 22, 2023 | Buena Vista Aquatic Recreational Area (Central) | None | Testing results below posting triggers |
| Aug 22, 2023 | West Boat Ramp (West) | None | Testing results below posting triggers |
| May 18, 2022 | Buena Vista Aquatic Recreational Area (Central) | None | |
| May 18, 2022 | East Boat Ramp (East) | None | |
| May 18, 2022 | East Boat Ramp (East) | None | |
| May 18, 2022 | West Boat Ramp (West) | None | |
| Dec 4, 2018 | Lake Webb (Buena Vista) | None | |
| Jan 3, 2018 | BUENA VISTA LAKE SITE 2 | 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.