Rock Creek: toxic algae advisories
Rock Creek, Plumas County. See all Plumas County waters.
What the state's records say
Caution advisory, last posted Jul 1, 2021. 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 Rock Creek
The state has an advisory on file for Rock Creek (Caution advisory), last posted Jul 1, 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 |
|---|---|
| ~5.7mi above Jennie Creek (518RCAJNC) | The state's latest record, from Sep 9, 2026, recommends no advisory. |
| ~5.7mi above Jennie Creek | The state's latest record, from Sep 9, 2026, recommends no advisory. |
| ~5.7mi above Jennie Creek | Caution advisory, last posted Jul 1, 2021. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Rock 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 9, 2026 | ~5.7mi above Jennie Creek (518RCAJNC) | None | |
| Sep 9, 2026 | ~5.7mi above Jennie Creek | None | End date recorded: Aug 13, 2022. Testing results below posting triggers |
| Sep 9, 2026 | ~5.7mi above Jennie Creek | None | End date recorded: Aug 13, 2022. Testing results below posting triggers |
| Jul 16, 2025 | ~5.7mi above Jennie Creek | None | End date recorded: Aug 13, 2022. Testing results below posting triggers |
| Jul 13, 2022 | ~5.7mi above Jennie Creek | None | End date recorded: Aug 13, 2022. Testing results below posting triggers |
| Jul 13, 2022 | ~5.7mi above Jennie Creek | None | Testing results below posting triggers |
| Jul 1, 2021 | ~5.7mi above Jennie 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.