Algae also cause depletion of dissolved oxygen required by fish. Little effect as saltwater already contains major amounts of phosphorus. Pathogens Fecal Coliform Failing septic tanks, illegal boat discharges, animal and aquatic bird wastes, storm runoff Health hazard to swimmers and eaters of shellfish Creates health hazards to humans via direct contact or shellfish consumption resulting in affected area closures. Virus Septic tanks, storm runoff Health hazard to swimmers and eaters of shellfish Can create health hazards to humans via direct contact or shellfish consumption resulting in affected area closures. Hepatitis is of particular concern.
Chemicals leach into water Potential human health effects.
Chemicals wash off plants and into surface and ground water. Fish inhabiting the bay may build up concentrations of pesticides. Birds eating contaminated bait fish may have reduced reproductive success. Hydrocarbon Boat refueling, underwater boat exhausts, creosote pilings Potential health hazard if accumulated concentrations are high Potential human health effects.