East Creek: toxic algae advisories
East Creek, Lassen County. See all Lassen County waters.
What the state's records say
Caution advisory, last posted Aug 27, 2026. No all-clear recorded.
2 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 East Creek
The state has an advisory on file for East Creek (Caution advisory), last posted Aug 27, 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.
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 |
|---|---|
| above Mosquito Cr. (526ESCAMC) | Algal mat alert sign, last posted Aug 27, 2026. No all-clear recorded. |
| above Mosquito Cr. by Buck Mtn (526ESCAMC) | The state's latest record, from Jun 27, 2025, recommends no advisory. |
| above Mosquito Cr. | Caution advisory, last posted Sep 29, 2021. No all-clear recorded. |
Advisory history
Every advisory record the state has published for East Creek, 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 27, 2026 | above Mosquito Cr. (526ESCAMC) | Algal mat alert sign | Alert-high concentration toxins |
| Jun 27, 2025 | above Mosquito Cr. by Buck Mtn (526ESCAMC) | None | Updates from routine monitoring program-organization |
| Sep 29, 2021 | above Mosquito Cr. | 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.