Regulatory State of the BayStatus and Trends

Tom MumleySan Francisco Bay

Regional Water Quality Control Board

Napa River Pathogens, Sediment,

NutrientsSonoma Creek Pathogens, Sediment,

Nutrients

Guadalupe River Watershed Mercury

San Francisquito Creek Sediment

Tomales Bay Watershed

Pathogens, Sediment, Nutrients, Mercury

San Francisco Bay Area Urban Creeks

Diazinon, Pesticide Toxicity

San Francisco Bay Mercury, PCBs,

Legacy Pesticides, Selenium, plus Copper

and Cyanide WQOs

SF Bay Region TMDL Projects 2006

Green = done Blue = this year Maroon = next

Napa River Pathogens, Sediment,

NutrientsSonoma Creek Pathogens, Sediment,

Nutrients

Guadalupe River Watershed Mercury

San Francisquito Creek Sediment

Tomales Bay Watershed

Pathogens, Sediment, Nutrients, Mercury*

San Francisco Bay Area Urban Creeks

Diazinon, Pesticide Toxicity

SF Bay Region TMDL Projects 2007

Green = done Blue = this year Maroon = next

Richardson Bay Pathogens

Petaluma River Pathogens, Sediment, Nutrients

Pescadero/Butano Creeks Sediment

SF Bay TMDL Projects 2007

Green = done Blue = this year Maroon = next

San Francisco Bay Mercury, PCBs, Legacy Pesticides, Dioxins, Selenium

plus Copper and Cyanide Water Quality Objectives

1975 – The First Basin Plan

Water Quality StandardsResolution 68-16 = antidegradationBeneficial usesWater quality objectives

“No toxics in toxics amounts”

1975 – The First Basin Plan

Prohibitions (no < 10 to 1 dilution) Secondary treatment for wastewater

“Future attempts to control water quality must be based on factors more omnibus than consideration of municipal and industrial wastewater treatment alone.”

1982 – Basin Plan

Toxicity limit in wastewater permitsMetals and CN limitsConstruction-site erosion and sediment control

1986 – Basin Plan

Metals water quality objectivesMetals and CN limitsFlow-through bioassay acute toxicity limitChronic toxicity studiesUrban runoff management Program

Inception of Regional Monitoring

RMP created in 1992 Based on UC Santa Cruz

and BPTC Program studies

Other factors SF Estuary Project SF Estuary Institute

1995 – 2005 Basin Plans

Narrative no bioaccumulation objectiveNPDES stormwater regsDredging and dredge disposal Long Term Management Strategy

California Toxics Rule and State Implementation Policy

303(d) and TMDL Era

1998 SF Bay 303(d) List Copper Diazinon Dioxins/furans Legacy pesticides

• Chlordane• DDT• Dieldrin

Mercury Nickel PCBs Selenium

Green = done Blue = this year Maroon = next

The Future

Emerging pollutants Fire retardants (PBDEs) Perfluorinated compounds Pharmaceuticals

Pesticides ? Diazinon replacements → pyrethroids

Trash PAHs ?Nutrients ?

The Future

Mercury 2.0 Methylmercury production and fate Fate of mercury in bay sediments Nutrients?

PCBs 2.0 Fate of PCBs in bay sediments

• Sediment transport• Relevance of dredging

North Bay vs South Bay segments Urban and non-urban runoff loads

Sediment transport salt ponds

For TMDL info: www.waterboards.ca.gov/sanfranciscobay/tmdlmain.htm

For Basin Plan (WQOs) info:www.waterboards.ca.gov/sanfranciscobay/basinplan.htm