Corcoran Lagoon: toxic algae advisories
Corcoran Lagoon, Santa Cruz County. See all Santa Cruz County waters.
What the state's records say
Caution advisory, last posted Jun 19, 2024. 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 Corcoran Lagoon
The state has an advisory on file for Corcoran Lagoon (Caution advisory), last posted Jun 19, 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 |
|---|---|
| Santa Cruz | The state's latest record, from Aug 20, 2025, recommends no advisory. |
| Corcoran Lagoon Beach | Caution advisory, last posted Jun 19, 2024. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Corcoran Lagoon, 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 |
|---|---|---|---|
| Aug 20, 2025 | Santa Cruz | None | Updates from routine monitoring program-organization |
| Jul 31, 2025 | Santa Cruz | None | Updates from routine monitoring program-organization |
| Jul 9, 2025 | Santa Cruz | None | Updates from routine monitoring program-organization |
| Jun 12, 2025 | Santa Cruz | None | Updates from routine monitoring program-organization |
| May 30, 2025 | Santa Cruz | Visual observation | Updates from routine monitoring program-organization |
| Jun 19, 2024 | Corcoran Lagoon Beach | Caution | No cyano bloom w/photos |
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.