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Bacteria in the Hudson River. Enterococci as microbial indicators of pathogens. Where does bacteria come from?. Untreated wastewater (CSOs) Improper boat waste disposal Animal and wildlife waste Stormwater runoff. Enterococci.

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bacteria in the hudson river

Bacteria in the Hudson River

Enterococci as microbial indicators of pathogens

where does bacteria come from
Where does bacteria come from?
  • Untreated wastewater (CSOs)
  • Improper boat waste disposal
  • Animal and wildlife waste
  • Stormwater runoff
enterococci
Enterococci
  • Bacteria from the intestines of humans and other warm-blooded animals
  • Used by the EPA as federal standard to indicate presence of pathogens
  • Pathogens indicated by presence of enterococci can cause gastrointestinal disease in humans
sewage
Sewage
  • NYC sewer system- 6000 miles of sewer pipes
  • 14 water treatment plants throughout NYC
  • NYC produces ~1.4 billion gallons of wastewater per day
slide5

North River Wastewater Treatment Plant

Capacity: 170 million gallons per day

125 mgd, dry weather

340 mgd, wet weather

slide7
Combined sewer system (CSS)=

combination of street drains and household and industrial wastewater

  • 494 outfalls in New York City
  • EPA: CSO Control Policy
    • separate underground pipes for sewage and stormwater
    • keep combined pipes, increase capacity
water quality standards
Water Quality Standards
  • EPA enterococci standards
    • In Marine waters for bathing, 35 CFU/100mL
    • Ingestion of contaminated shellfish or surface water can cause gastrointestinal disease
enterolert
Enterolert

New method of testing enterococci by Idexx

Laboratories using a nutrient indicator that

fluoresces when metabolized by the bacteria

colilert
Colilert

Similar technology in which nutrient indicator turns yellow when metabolized by coliforms, and flouresces when metabolized by E.Coli.

other measurements
Other Measurements
  • Precipitation, turbidity, temperature, tides, suspended matter, organic/inorganic matter, and salinity are monitored along with enterococci, total coliform, and E.Coli.
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