October 2, 2012

South Bay Salt Ponds

Extensive tidal wetlands and marshes once almost covered South San Francisco Bay below the present-day Dumbarton Bridge. For the last 150 years these wetlands have received mercury-laden drainage from the New Almaden mercury mining district, in the upper reaches of the Guadalupe River watershed. Salt pond construction in the last century buried mercury-contaminated sediments. But restoration poses challenges for water quality. Redistributing sediment and introducing tidal action can release mercury into the water column and may cause the mercury to methylize, which...
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The San Francisco Bay-Delta is named in the federal Clean Water Act as one of 28 “estuaries of national significance." For over 20 years, the San Francisco Estuary Partnership has worked together with local communities and federal and state agencies to improve the health of California’s most urbanized estuary.

San Francisco Estuary Partnership 1515 Clay Street, Suite 1400 Oakland, CA 94612 (510) 622-2304

Association of Bay Area Governments