Table V.

Typical Pathogen survival times at 20–30 °C. (in days) ^d

Pathogen	Survival Time (days)
	Fresh Water & Sewage	Crops	Soil
Virusesa
Enterovirusesb	< 120 but usually < 50	< 60 but usually < 15	< 100 but usually < 20
Bacteria
Fecal conforms a,c	< 60 but usually < 30	< 30 but usually < 15	< 70 but usually < 20
Salmonella spp.a	< 60 but usually < 30	< 30 but usually < 15	< 70 but usually < 20
Shigella spp.a	< 30 but usually < 10	< 10 but usually < 5	---
Vibrio choleraed	< 30 but usually < 10	< 5 but usually < 2	< 20 but usually < 10
Protozoa
Entamoeba histolytica cysts	< 30 but usually < 15	< 10 but usually < 2	< 20 but usually < 10
Helminths
Ascaris lumbricoides eggs	Many months	< 60 but usually < 30	Many months

^aIn seawater, viral survival is less, and bacterial survival is very much less than in fresh water.

^bIncludes polio, echo-, and Coxsackie viruses.

^cV. cholerae survival in aqueous environments is uncertain.

^dTaken from USEPA Guidelines for Water Reuse, 2004 (http://nepis.epa.gov/Adobe/PDF/30006MKD.pdf).

Adapted from Feacham et. al., 1983