Antelope Creek: toxic algae advisories
Antelope Creek, Tehama County. See all Tehama County waters.
What the state's records say
Caution advisory, last posted Sep 9, 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 Antelope Creek
The state has an advisory on file for Antelope Creek (Caution advisory), last posted Sep 9, 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 |
|---|---|
| MF ~0.4mi above Ponderosa Way (509PS0170) | The state's latest record, from Jun 24, 2026, recommends no advisory. |
| North Fork ~1.6 km below Ponderosa Way (509NFA463) | The state's latest record, from Jun 24, 2026, recommends no advisory. |
| SF ~0.4mi above NF (509ACS335) | The state's latest record, from Jun 24, 2026, recommends no advisory. |
| MF ~0.4mi above Ponderosa Way | Caution advisory, last posted Sep 9, 2021. No all-clear recorded. |
| North Fork at Ponderosa Way. | Caution advisory, last posted Sep 9, 2021. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Antelope 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 24, 2026 | MF ~0.4mi above Ponderosa Way (509PS0170) | None | |
| Jun 24, 2026 | North Fork ~1.6 km below Ponderosa Way (509NFA463) | None | |
| Jun 24, 2026 | SF ~0.4mi above NF (509ACS335) | None | |
| Sep 9, 2021 | MF ~0.4mi above Ponderosa Way | Caution | Advisory based on visual and toxins |
| Sep 9, 2021 | North Fork at Ponderosa Way. | 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.