Fresno County: lake and river algae advisories

8 waters in Fresno County appear in the state's harmful algal bloom records. Waters whose latest record is an advisory come first.

Waters in Fresno County and what the state's latest record says
WaterLatest record
Hume LakeCaution advisory, last posted Jul 29, 2026. No all-clear recorded.
San Joaquin RiverAlgal mat alert sign, last posted Aug 29, 2025. No all-clear recorded.
South Fork Kings RiverAlgal mat alert sign, last posted Aug 23, 2022. No all-clear recorded.
Boulder CreekThe state's latest record, from Aug 29, 2025, recommends no advisory.
Davis CreekThe state's latest record, from Jun 19, 2025, recommends no advisory.
Millerton LakeThe state's latest record, from Aug 28, 2023, recommends no advisory.
Pine Flat ReservoirThe state's latest record, from Aug 27, 2018, recommends no advisory.
Pitman CreekThe state's latest record, from Aug 29, 2025, recommends no advisory.