Table 1

Parameters	Guide levels	Acceptable maximal values
Turbidity	0.05	0.10
Temperature (°C)	12	25
pH	6.5 to 8.5	9.5
Total coliforms ( cfu / 100ml)	0	0
Fecal coliform (cfu / 100ml)	0	0
Escherchia coli ( cfu / 100ml)	0	0
Vibrio cholerae	0	0
Other enteropathogens	0	0

Table 1: Indicative values (WHO 2006).