Evaluation of Occurrence, Concentration, and Removal of Pathogenic Parasites and Fecal Coliforms in Three Waste Stabilization Pond Systems in Tanzania

Table 6

Bacterial quality requirement for wastewater effluent reuse in agricultural irrigation.

Type of irrigation	WTS required FC (E. coli) reduction (log units)	Effluent FC (E. coli) concentration during monitoring (cfu/100 ml)	Notes
Unrestricted	4	≤10^3	Root crops
	3	≤10^4	Leaf crops
	2	≤10^5	Drip irrigation of high-growing crops
Restricted	4	≤10^3	Drip irrigation of low-growing crops
	3	≤10^4	Labour-intensive agriculture
	2	≤10^5	Highly mechanized agriculture

Note. Table modified from the WHO 2006 guideline. WTS = wastewater treatment system.