Bolinas (Wharf Road)

Bolinas, California
Managed by The Swim Guide

This small beach at the mouth of Bolinas Lagoon provides views of Stinson Beach and Bolinas Bay to the south.

WATER QUALITY
  • Passed water quality tests 60-95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on . The Swim Guide updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
CURRENT WEATHER
11°C
A few clouds
MONITORING FREQUENCY

Bolinas (Wharf Road) is sampled weekly from April 1st to May 31st

SOURCE INFORMATION

Marin County Environmental Health Services collects samples at this beach every Monday from April 1st - October 31st and tested for levels of total coliform, fecal coliform and enterococcus. Results are typically available to the public before the weekend. Swim Guide checks daily for updates during the monitoring season.

The standards for indicator bacteria are as follows:

Single sample maximum
Total Coliform > 10,000 MPN (Most Probable Number) / 100 ml of water
Fecal Coliform > 400 MPN / 100 ml
Enterococcus > 104 MPN / 100 ml

Geometric Mean (5 samples collected over a 30 day period)
Total Coliform > 1,000 MPN / 100 ml of water
Fecal Coliform > 200 MPN / 100 ml
Enterococcus > 33 MPN / 100 ml

A coastal beach is marked Green when bacteria levels for a single day and geometric mean are below the standards mentioned.

A coastal beach is marked Red when bacteria levels for a single day or the geometric mean are above the standards mentioned.

A beach is marked Grey when there is no current or reliable monitoring information available.

WATER QUALITY GRAPH

Bolinas (Wharf Road)

Bolinas, California
Managed by The Swim Guide

WATER QUALITY
  • Passed water quality tests 60-95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on . The Swim Guide updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
CURRENT WEATHER
11°C
A few clouds

This small beach at the mouth of Bolinas Lagoon provides views of Stinson Beach and Bolinas Bay to the south.

MONITORING FREQUENCY

Bolinas (Wharf Road) is sampled weekly from April 1st to May 31st

SOURCE INFORMATION

Marin County Environmental Health Services collects samples at this beach every Monday from April 1st - October 31st and tested for levels of total coliform, fecal coliform and enterococcus. Results are typically available to the public before the weekend. Swim Guide checks daily for updates during the monitoring season.

The standards for indicator bacteria are as follows:

Single sample maximum
Total Coliform > 10,000 MPN (Most Probable Number) / 100 ml of water
Fecal Coliform > 400 MPN / 100 ml
Enterococcus > 104 MPN / 100 ml

Geometric Mean (5 samples collected over a 30 day period)
Total Coliform > 1,000 MPN / 100 ml of water
Fecal Coliform > 200 MPN / 100 ml
Enterococcus > 33 MPN / 100 ml

A coastal beach is marked Green when bacteria levels for a single day and geometric mean are below the standards mentioned.

A coastal beach is marked Red when bacteria levels for a single day or the geometric mean are above the standards mentioned.

A beach is marked Grey when there is no current or reliable monitoring information available.

WATER QUALITY GRAPH



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