Environmental Monitoring of Fecal Pollution in San Pablo Bay

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Environmental Monitoring of Fecal Pollution in
San Pablo Bay

• Joy Sirikanchana, Ph.D.
• Postdoctoral Researcher
• Prof. Stefan Wuertzs Lab, UC Davis
• joysiri_at_ucdavis.edu

CICEET SFNERR Workshop Oakland, January 25, 2008
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Water Sampling Sites
Suisun Bay
San Pablo Bay
Pacific Ocean
San Francisco Bay
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Water Sampling Sites
Sonoma Creek
Napa River
Petaluma River
Gallinas Creek
Carquinez Strait
San Pablo Strait
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Large-system and small-system ultrafiltration
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Comparison of Bacteroidales concentrations
(Microbial Source Tracking)
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Comparison of Bacteroidales concentrations
(Microbial Source Tracking)
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Summary to date

• First sampling event 4 L
• Microbial Source Tracking
• Universal Bacteroidales -- detected in all
  sampling locations
• Human Bacteroidales -- detected in some locations
• Cow and dog bacteroidales -- not detected
• Pathogens
• No detection of adenoviruses, enterovirus, and
  Francisella
• E.coli and enterococci
• Colilert-18 and Enterolert kits from Idexx

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Next steps

• Take 100 L water sample at each site
• Measure Bacteroidales, Pathogens, and bacterial
  indicators (E.coli and enterococci)
• Need information on decay of source markers and a
  model to predict what happens

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Sampling Schedule

• Weather seasons
• Dry weather season April to October
• Wet weather season November to March

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Acknowledgements

• Romberg Tiburon Center, San Francisco National
  Environmental Research Reserve (NERR)
• Dr. Drew Talley
• Marina Psaros
• David Bell
• David Morgan
• Laurie Kara

• University of California, Davis
• Anthony McDonald
• Prof. Fabian Bombardelli
• Dr. Alexander Schriewer
• Dan Wang
• Sungwoo Bae
• Asma Rizvi
• Jovanna Cupovic
• Trang Le
• Hong Ly