Butte County: lake and river algae advisories
14 waters in Butte County appear in the state's harmful algal bloom records. Waters whose latest record is an advisory come first.
| Water | Latest record |
|---|---|
| Big Chico Creek | Caution advisory, last posted Jul 12, 2024. No all-clear recorded. |
| California Park Lake | Danger advisory, last posted Apr 30, 2016. No all-clear recorded. |
| Horseshoe Lake | Caution advisory, last posted Nov 6, 2025. No all-clear recorded. |
| Lake Oroville | Caution advisory, last posted Sep 14, 2026. No all-clear recorded. |
| North Table Mountain Ecological Reserve | Algal mat alert sign, last posted Sep 28, 2026. No all-clear recorded. |
| Phantom Falls creek | Algal mat alert sign, last posted May 11, 2023. No all-clear recorded. |
| Butte Creek | The state's latest record, from Jun 11, 2026, recommends no advisory. |
| Clear Creek | The state's latest record, from Jun 30, 2021, recommends no advisory. |
| Concow Creek | The state's latest record, from Jul 1, 2021, recommends no advisory. |
| Dry Creek | The state's latest record, from Jun 30, 2021, recommends no advisory. |
| Feather River | The state's latest record, from Sep 17, 2026, recommends no advisory. |
| Fish Creek | The state's latest record, from Jun 11, 2026, recommends no advisory. |
| Thermalito Afterbay | The state's latest record, from Sep 4, 2026, recommends no advisory. |
| Thermalito Forebay | The state's latest record, from Sep 4, 2026, recommends no advisory. |