Skip to main content

Advertisement

Table 2 Microbiological surveillance of tap water*

From: Waterborne microbial risk assessment : a population-based dose-response function for Giardia spp. (E.MI.R.A study)

  Group 1 Group 2 Group 3 Group 4
  G C V B G C V B G C V B G C V B
Run 1 < < < - < < < + < < < - < < + -
Run 2 30 < < - 10 < < - < < + - < < + -
Run 3 < < < - < < < - < < < - 110 < < -
Run 4 10 < < - 20 < < - 10 < + - < < + -
Run 5 < < < + < < + - < < + - < < + -
Run 6 < < < - < < < - < 3 < + < 1 + -
Run 7 10 < < - < < + + < < < - < < + -
Run 8 < < < + < 4 < - < < < - < < < -
Alert 1 < < < -             
Alert 2              < < < +
Alert 3          10 < + -     
Alert 4      < < < -         
  1. * < = below detection limit. G = Giardia cysts counts (N per 100 L); C = Cryptosporidium oocysts counts (N per 100 L); V = no detection (<) or detection (+) of viral RNA (enterovirus, rotavirus, or astrovirus); B = compliance (-) or non compliance (+) with bacterial indicators' limit values