TABLE 5.

Annualized risk estimates for bacteria and protozoa

OrganismMean risk estimate (90% prediction interval)
RecreatoraVisitoraHomeless personb
Bacteria
    Fecal Streptococcus0.68 (0.26-0.96)0.14 (0.05-0.28)0.88 (0.54-1.0)
    Enterococcus0.67 (0.26-0.96)0.14 (0.05-0.27)0.88 (0.54-1.0)
Protozoa
    GiardiaaNDcND1.00
  • a Based on water sampling data collected by IEC (n = 36); considered to be representative of typical conditions along the Lower Passaic River.

  • b Based on water sample collected from discharging CSO (n = 1). This value was used only for the homeless person scenario based on observations of homeless individuals in direct contact with outfall discharge.

  • c ND, no data.