Sierra County: lake and river algae advisories
10 waters in Sierra County appear in the state's harmful algal bloom records. Waters whose latest record is an advisory come first.
| Water | Latest record |
|---|---|
| Cold Stream | Caution advisory, last posted Aug 7, 2026. No all-clear recorded. |
| Lincoln Creek | Caution advisory, last posted Sep 30, 2021. No all-clear recorded. |
| Little Truckee River | Caution advisory, last posted Oct 9, 2024. No all-clear recorded. |
| Oregon Creek | Caution advisory, last posted Jul 1, 2021. No all-clear recorded. |
| Pass Creek | Caution advisory, last posted Jul 14, 2021. No all-clear recorded. |
| Tributary to Pass Creek | Algal mat alert sign, last posted Jun 4, 2026. No all-clear recorded. |
| Unnamed creek | Algal mat alert sign, last posted May 29, 2025. No all-clear recorded. |
| Lavezzola Creek | The state's latest record, from Aug 21, 2026, recommends no advisory. |
| Slate Creek | The state's latest record, from Jul 16, 2026, recommends no advisory. |
| Stampede Reservoir | The state's latest record, from Oct 7, 2026, recommends no advisory. |