PROJECT NEPTUNE

Ocean Water Quality

Forecast for June 4, 2026
Manhattan Beach, CA

Manhattan Beach - 26th St

Normal

Predicted to be below the EPA swimming threshold today.EPA swimming thresholdThe EPA's safe-swimming limit for ocean water is 104 MPN/100mL — the most probable number of bacteria per 100 milliliters. Readings above this are classified as an exceedance, meaning bacteria levels are unsafe for swimming.

13%exceedance probabilityExceedance probabilityLess is better — under 30% means low risk. There's a 13% chance the water has an unsafe amount of bacteria.

7-Day Window

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