Except as provided in 18 AAC 74.006, the department will classify a community or nontransient non-community water system with fewer than 100 service connections that is used or intended for use by fewer than 500 individuals per day, a community or non-transient noncommunity water system with fewer than 15 service connections that is used or intended for use by more than 500 individuals per day, and a transient non-community water system that uses a surface water source or groundwater under the direct influence of surface water source, as follows:

1. (1) a water system that does not add chemicals to the water will be classified as a small, untreated water system;
2. (2) a water system that adds a single chemical to the water will be classified as a small, treated water system;
3. (3) for purposes of this section, the use of ultraviolet light to meet an inactivation requirement will be considered the equivalent of the addition of a single chemical.

(Eff. 11/26/2016, Register 220)