Hearst Memorial State Beach - Hsb23 is a saltwater beach in San Luis Obispo County, California. Across 300 bacteria samples collected between 2022 and 2025 at nearby monitoring stations, it earns a Beach Safety Grade of A — Excellent.
About 0.7% of samples at Hearst Memorial State Beach - Hsb23 exceeded the EPA Beach Action Value of 104 CFU/100 mL for Enterococcus — the threshold at which water managers typically post a swimming advisory. In practice that means the safe-swimming limit was almost never crossed here over the monitored period. Bacteria samples almost never exceed the safe-swimming threshold.
Hearst Memorial State Beach - Hsb23 was not under a swimming advisory in the most recent EPA snapshot. Conditions can change quickly after heavy rain or high runoff, so it's still worth checking the current advisory the day you go.