Pebble Beach is a freshwater beach in San Mateo County, California. Across 326 bacteria samples collected between 2022 and 2025 at nearby monitoring stations, it earns a Beach Safety Grade of B — Good.
About 4% of samples at Pebble Beach exceeded the EPA Beach Action Value of 235 CFU/100 mL for Escherichia coli — the threshold at which water managers typically post a swimming advisory. In practice that means the safe-swimming limit was rarely crossed here over the monitored period. Bacteria samples rarely exceed the safe-swimming threshold.
Pebble Beach is currently listed as inactive in the EPA beach-monitoring program, so it may no longer be routinely sampled. Its grade reflects the water-quality results collected while it was active — useful history, but confirm the beach's current status and any local advisory before you visit.