NAC445A.550. Standards for bottled water: Coliform organisms.

     1. When bottled water is delivered to a customer, it must not contain any coliform bacteria and must be examined by using one of the following methods:

     (a) The method of multiple-tube fermentation;

     (b) The method which uses a membrane filter; or

     (c) The MMO-MUG test.

     2. If any method described in subsection 1 indicates the presence of coliform bacteria, the lot of water tested must be resampled. If the resampling confirms the presence of coliform bacteria, the water must be recalled by the operator. The resampling must occur within 1 working day.

     3. As used in this section, MMO-MUG test means a minimal medium ONPG-MUG test approved by the United States Environmental Protection Agency to determine the presence or absence of fecal coliform bacteria and Escherichia coli.

     (Added to NAC by Bd. of Health, eff. 10-14-82; A 9-15-94)