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Table 1

Microbial load and seasonal variation of drinking water quality at the POU in food establishments of Addis Ababa (n = 250)

Presence of indicator of contaminants (Cfu/100 ml) at 44.5 °CRainy season (n = 125)Dry season (n = 122)WHO permissible level in number of micro-organisms (n)
Thermo-tolerant/fecal coliforms Present 41 (32.8%) 20 (16.4%) 
Absent 84 (67.2%) 102 (83.6%) 
E. coli Present 33 (26.4%) 13 (10.7%) 
Mean of thermo-tolerant or fecal coliforms/colony count per 100 ml 7.59 3.12 
Sources of the food establishments drinking water Frequency Percent(%) 
 Municipality 123 98.4 
 Spring and others 1.6 
Presence of indicator of contaminants (Cfu/100 ml) at 44.5 °CRainy season (n = 125)Dry season (n = 122)WHO permissible level in number of micro-organisms (n)
Thermo-tolerant/fecal coliforms Present 41 (32.8%) 20 (16.4%) 
Absent 84 (67.2%) 102 (83.6%) 
E. coli Present 33 (26.4%) 13 (10.7%) 
Mean of thermo-tolerant or fecal coliforms/colony count per 100 ml 7.59 3.12 
Sources of the food establishments drinking water Frequency Percent(%) 
 Municipality 123 98.4 
 Spring and others 1.6 
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