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Table 2 Removal of microbial agents in treated wastewater according to US-EPA standards (Ref. [26, 27])

From: Effectiveness of wastewater treatment systems in removing microbial agents: a systematic review

ParameterStandard
Total coliforms1000 aMPN/100 mL
SalmonellaNot detected/50 g of final product
Escherichia coli< 100 aMPN per gram (dry weight)
Fecal coliforms< 1000 aMPN per gram (dry weight)
Enteric viruses<  1 PFU per 4 g total dry solids
Helminth eggs (Ascaris sp. and Taenia sp.)<  1 per 4 g total dry solids
  1. aMPN Most Probable Number