Arnot Creek: toxic algae advisories
Arnot Creek, Alpine County. See all Alpine County waters.
What the state's records say
Caution advisory, last posted Aug 12, 2021. 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 Arnot Creek
The state has an advisory on file for Arnot Creek (Caution advisory), last posted Aug 12, 2021, 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 |
|---|---|
| (534SED001) | The state's latest record, from Sep 16, 2026, recommends no advisory. |
| Arnot Cr 1 (534SED001) | The state's latest record, from Aug 29, 2025, recommends no advisory. |
| above Clark Fork | Caution advisory, last posted Aug 12, 2021. No all-clear recorded. |
| Waterbody name submitted:Arnot Creek.;Landmark submitted:None | Caution advisory, last posted Aug 12, 2021. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Arnot 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 |
|---|---|---|---|
| Sep 16, 2026 | (534SED001) | None | |
| Aug 29, 2025 | Arnot Cr 1 (534SED001) | None | Updates from routine monitoring program-organization |
| Sep 13, 2024 | Arnot Cr 1 (534SED001) | None | Updates from routine monitoring program-organization |
| Aug 12, 2021 | above Clark Fork | Caution | Advisory based on visual and toxins |
| Aug 12, 2021 | Waterbody name submitted:Arnot Creek.;Landmark submitted:None | 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.