Butte Creek: toxic algae advisories
Butte Creek, Siskiyou County. See all Siskiyou County waters.
What the state's records say
Caution advisory, last posted Jun 27, 2025. No all-clear recorded.
3 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 Butte Creek
The state has an advisory on file for Butte Creek (Caution advisory), last posted Jun 27, 2025, 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 |
|---|---|
| ~1.5mi below Spring Creek, east Deer Mtn (105PS0540) | Algal mat alert sign, last posted Jun 27, 2025. No all-clear recorded. |
| ~1.5mi below Spring Creek (105PS0540) | The state's latest record, from Nov 26, 2024, recommends no advisory. |
| Butte Creek ~1.5mi below Spring Creek | Algal mat alert sign, last posted Jun 24, 2022. No all-clear recorded. |
| ~1.5mi below Spring Creek | Caution advisory, last posted Oct 1, 2021. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Butte 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 |
|---|---|---|---|
| Jun 27, 2025 | ~1.5mi below Spring Creek, east Deer Mtn (105PS0540) | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jun 27, 2025 | ~1.5mi below Spring Creek, east Deer Mtn (105PS0540) | Algal mat alert sign | Updates from routine monitoring program-organization |
| Nov 26, 2024 | ~1.5mi below Spring Creek (105PS0540) | None | De-posting advisory. |
| Aug 2, 2024 | ~1.5mi below Spring Creek (105PS0540) | Algal mat alert sign | Bottom/benthic bloom observed |
| Aug 10, 2023 | ~1.5mi below Spring Creek (105PS0540) | Algal mat alert sign | Bottom/benthic bloom observed |
| Jun 24, 2022 | Butte Creek ~1.5mi below Spring Creek | Algal mat alert sign | Updates from routine monitoring program-organization |
| Oct 1, 2021 | ~1.5mi below Spring Creek | 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.