Calaveras County: lake and river algae advisories

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

Waters in Calaveras County and what the state's latest record says
WaterLatest record
Lake TullochCaution advisory, last posted Aug 17, 2026. No all-clear recorded.
Lake TullochCaution advisory, last posted Jul 31, 2026. No all-clear recorded.
New Melones ReservoirCaution advisory, last posted Aug 10, 2021. No all-clear recorded.
salt spring valley reservoirCaution advisory, last posted Dec 10, 2019. No all-clear recorded.
TullochCaution advisory, last posted Aug 5, 2026. No all-clear recorded.
Forest Meadows Golf CourseThe state's latest record, from Oct 9, 2019, recommends no advisory.
Maxwell CreekReports on file, with no advisory level the state has classified.
New Hogan ReservoirThe state's latest record, from May 2, 2019, recommends no advisory.
Tulloch ReservoirReports on file, with no advisory level the state has classified.