(a) Approved system. Drinking water shall be obtained from an approved source that is:
- (1) A public water system; P or
- (2) A semipublic water system that is constructed, maintained, and operated according to law. P
- (b) System flushing and disinfection. A drinking water system shall be flushed and disinfected before being placed in service after construction, repair, or modification and after an emergency situation, such as a flood, that may introduce contaminants to the system. P
- (c) Bottled drinking water. Bottled drinking water used or sold in a retail food establishment shall be obtained from approved sources in accordance with 21 C.F.R. pt. 129, Processing and bottling of bottled drinking water. P