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Marin County’s water quality monitoring program gathered data from 26 bayside and oceanside monitoring locations. Ocean locations included: Dillon Beach, Bolinas Beach (Wharf Road), Stinson Beach, Muir Beach, Rodeo Beach, and Baker Beach. These locations were monitored on a weekly basis from April through October. During the winter season there was no monitoring.
For additional
water quality information, visit the Marin
County Department
of Environmental
Health website.
Summer dry season water quality was excellent at most beaches in Marin County. (Figures 34 and 35). Golden Hinde, which received a D grade in last year’s report, was not monitored this past year. North Muir Beach improved from a D grade in 2005 to an A during AB411 in 2006. China Camp received the county’s worst grade this year (D). McNears Beach improved slightly from a D grade during the AB411 2005 time period to a C in 2006. These two beaches exceeded the 30-day geometric mean for at least one bacterial indicator on more than 30% of the sampling days this year, resulting in the lowest grades in the county this year. All other monitoring locations in Marin County, except for Drakes Estero (B) and Bolinas Beach at Wharf Road (B), received A grades for the AB411 time period during 2006.
There was an insufficient amount of non-AB411 dry weather and wet weather data for further analysis.
Sewage
Spill Summary
There were zero (0) reported sewage spills in Marin
County that led to beach closures.
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