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Water Quality in San Francisco Bay

Water Quality in San Francisco Bay. J.A. Davis (jay@sfei.org) San Francisco Estuary Institute. San Francisco Estuary Institute. www.sfei.org Non-profit scientific organization Programs: Contaminant Monitoring and Research Program Regional Monitoring Program

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Water Quality in San Francisco Bay

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  1. Water Quality in San Francisco Bay J.A. Davis (jay@sfei.org) San Francisco Estuary Institute

  2. San Francisco Estuary Institute • www.sfei.org • Non-profit scientific organization • Programs: • Contaminant Monitoring and Research Program • Regional Monitoring Program • Aquatic Pesticide Monitoring Program • Regional Watershed Science Program • Regional Wetlands Monitoring Program • Biological Invasions

  3. Regional Monitoring Program • Innovative partnership between government, dischargers, and scientists • Work closely with the Regional Board • $ 3 million/year of stable funding • Began in 1993 • World class monitoring • Major change in direction beginning in 2002

  4. RMP Objectives • Compare monitoring information to relevant water quality objectives and other guidelines • Describe patterns and trends in contaminant concentration and distribution • Describe general sources and loading of contamination to the Estuary • Measure contaminant effects on selected parts of the Estuary ecosystem • Synthesize and distribute information from a range of sources to present a more complete picture of the sources, distribution, fates, and effects of contaminants in the Estuary ecosystem

  5. RMP Components • Water Chemistry • Aquatic Toxicity • Sediment Chemistry • Sediment Toxicity • Bivalve Bioaccumulation • Fish • Pilot Studies • Special Studies

  6. 303(d) Listed Chemicals • Draft list from 11/01 • High Priority • Mercury, PCBs • Medium • Chlordane, DDT, Dieldrin, Diazinon • Low • Selenium, Dioxins, Furans, Dioxin-like PCBs

  7. 303(d) “B” Listed Chemicals • Draft list from 11/01 • Copper • Nickel • PAHs • PBDEs • Sediment Toxicity

  8. PCB Concentrations in San Francisco Bay Fish Fillets, 2000

  9. Mercury Concentrations in San Francisco Bay Fish Fillets, 2000

  10. Comparisons to Screening Values

  11. Conceptual Model of PCB Fate in the Bay

  12. Predicted Long Term Trends in PCB Mass with Varying Loads

  13. New Contaminants of Concern: Flame Retardants TetraBDE PentaBDE Triphenylphosphate HexaBDE Sources: textiles, household and industrial products Use: reduces flame capacity of materials Max level: ppt (ng/L) Sacramento River water Concern: endocrine system disruption, bioaccumulation

  14. My Water Quality Report Card for the Bay • Getting Better • DDT, chlordane • Sloooow improvement • PCBs • Staying the Same • Hg • Getting Worse • PBDEs (?), Pyrethroids (?)

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