N0

Each dot is one sample taken by the monitoring agency. The dashed brick line marks the EPA single-sample limit.

Common questions.

Is N0 safe to swim today?

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N0 is currently not safe for swimming. One or more bacteria readings exceeded EPA thresholds in the most recent sample. See the readings below for which indicator and how far above the limit.

When was N0 last tested?

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The most recent water-quality sample at N0 was collected on May 4, 2026 (29 days ago). California monitoring agencies test Bay Area beaches weekly during swim season (roughly May through October).

What is the bacteria level at N0?

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The latest reading at N0 shows 30-day enterococcus geomean at 89 MPN/100mL (EPA geomean limit: 35); E. coli at 322 MPN/100mL (EPA single-sample limit: 235); and enterococcus at 84 MPN/100mL (EPA single-sample limit: 104).

Does rain affect water quality at N0?

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Yes. Heavy rainfall washes bacteria and pollutants from land into the water, raising contamination risk for 24–72 hours. The past 48 hours recorded 0.00 in of rain; the past 72 hours recorded 0.00 in. Our advisory threshold is ≥1.00 in over 48h (or ≥0.50 in over 72h) for enclosed or storm-drain beaches.

Where is N0 located?

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N0 is located in the Bay Area area of the San Francisco Bay region (coordinates: 36.9623°N, 122.0236°W). You can get turn-by-turn directions via Google Maps or Apple Maps directly from this page.

How is the water quality data for N0 collected?

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Bacteria samples are collected by California state and county health agencies under the AB 411 Safe-to-Swim program and reported to the state's Safe-to-Swim database (data.ca.gov). Rainfall figures come from Open-Meteo forecast and archive data. Bay Area Swim aggregates both sources and updates every morning.