18.0  Appendix A.  North Carolina Water Quality standards for selected parameters (NCDEHNR 1996).
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Parameter                              Standard
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Dissolved oxygen                   5.0 ppm (mg/L)

Turbidity                                   25 NTU (tidal saltwater)
                                                  50 NTU (freshwater) 

Fecal coliform counts            14 CFU/100 mL (shellfishing waters), and more than 10% 
      of the samples cannot exceed 43 CFU/100 mL.                                       
  200 CFU/100 mL (human contact waters)

Chlorophyll a                          40 ppb (mg/L)
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CFU = colony-forming units
mg/L = milligrams per liter = parts per million
mg/L = micrograms per liter = parts per billion