Water Quality - Enumeration of culturable micro-organisms - Colony count by inoculation in a nutrient agar culture medium (First revision)
(ISO 6222:1999, MOD)
This Malaysian Standard specifies a method for the enumeration of culturable micro- organisms in
water by counting the colonies formed in a nutrient agar culture medium after aerobic incubation at 36
°C and 22 °C or 25 °C.
The method is intended to measure the operational efficiency of the treatment process of public
drinking water supplies and for general application to all types of water. It is particularly applicable to
the examination of water intended for human consumption, including water in closed containers and
to natural mineral water.
