TABLE 24.2.

Types and Numbers of Microorganisms Typically Found in Untreated Domestic Wastewater

Organism	Concentration (per ml)
Total coliform	105–106
Fecal coliform	104–105
Fecal streptococci	103–104
Enterococci	102–103
Shigella	Present
Salmonella	100–102
Clostridium perfringens	101–103
Giardia cysts	10 1–102
Cryptosporidium cysts	10 1–101
Helminth ova	10 2–101
Enteric virus	101–102

FromPepper, Gerba, and Brusseau, 2006.

© 2009