Big Break Regional Shoreline: toxic algae advisories
Big Break Regional Shoreline, Alameda County. See all Alameda County waters.
What the state's records say
The state's latest record, from Dec 8, 2022, recommends no advisory.
Last advisory on file: Nov 10, 2022.
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 Big Break Regional Shoreline
The state's latest record, from Dec 8, 2022, recommends no advisory. For Big Break Regional Shoreline, 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.
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 |
|---|---|
| Boat launch | The state's latest record, from Dec 8, 2022, recommends no advisory. |
Advisory history
Every advisory record the state has published for Big Break Regional Shoreline, 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 |
|---|---|---|---|
| Dec 8, 2022 | Boat launch | None | Floating/planktonic bloom observed |
| Dec 2, 2022 | Boat launch | None | Floating/planktonic bloom observed |
| Nov 28, 2022 | Boat launch | None | Floating/planktonic bloom observed |
| Nov 18, 2022 | Boat launch | None | Floating/planktonic bloom observed |
| Nov 14, 2022 | Boat launch | None | Floating/planktonic bloom observed |
| Nov 10, 2022 | Boat launch | Caution | Floating/planktonic bloom observed |
| Oct 27, 2022 | Boat launch | Caution | Floating/planktonic bloom observed |
| Oct 19, 2022 | Boat launch | Caution | Floating/planktonic bloom observed |
| Oct 17, 2022 | Boat launch | Caution | Floating/planktonic bloom observed |
| Oct 17, 2022 | Boat launch | Caution | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Oct 7, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Oct 3, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Sep 30, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Sep 26, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Sep 16, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Sep 8, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Sep 1, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Sep 1, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Sep 1, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Sep 1, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Aug 31, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Aug 26, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Aug 19, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Aug 12, 2022 | Boat launch | Danger | Floating/planktonic bloom observed; Updates from routine monitoring program-organization |
| Aug 10, 2022 | Boat launch | Danger | Updates from routine monitoring program-organization |
| Aug 5, 2022 | Boat launch | Danger | Updates from routine monitoring program-organization |
| Aug 2, 2022 | Boat launch | Danger | Updates from routine monitoring program-organization |
| Jul 22, 2022 | Boat launch | Danger | Updates from routine monitoring program-organization |
| Jul 15, 2022 | Boat launch | Danger | Updates from routine monitoring program-organization |
| Jul 14, 2022 | Boat launch | Caution | Updates from routine monitoring program-organization |
| Jun 27, 2022 | Boat launch | None | Updates from routine monitoring program-organization |
| Jun 17, 2022 | Boat launch | None | Updates from routine monitoring program-organization |
| Jun 10, 2022 | Boat launch | None | Updates from routine monitoring program-organization |
| May 27, 2022 | Boat launch | None | Updates from routine monitoring program-organization |
| May 19, 2022 | Boat launch | None | Updates from routine monitoring program-organization |
| May 12, 2022 | Boat launch | None | Updates from routine monitoring program-organization |
| May 12, 2022 | Boat launch | None | Updates from routine monitoring program-organization |
| May 6, 2022 | Boat launch | None | Updates from routine monitoring program-organization |
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.