1. Except as otherwise provided in subsection 4, each public utility that is required to adopt or update a plan of water conservation in accordance with the provisions of NRS 704.662 and:

(a) Serves 3,300 persons or more must conduct a water loss audit in accordance with the methodology and software of the American Water Works Association for water loss auditing. The results of the water loss audit must be submitted by the public utility to the Commission with the plan of water conservation or update to the plan of water conservation, as applicable.

(b) Serves less than 3,300 persons must calculate the amount of water delivered by the supplier of water and the amount of water that was billed to customers of the supplier of water for each year. The calculations must be submitted by the public utility to the Commission with the plan for water conservation or update to the plan of water conservation, as applicable.

2. If the public utility has previously submitted the results of a water loss audit to the Commission pursuant to paragraph (a) of subsection 1, and is submitting an update to the plan of water conservation, the public utility must also submit to the Commission:

(a) A comparison between the results of the new water loss audit and the previous water loss audit; and

(b) An analysis of any progress made by the public utility towards the goals for acceptable water loss established in the plan for water conservation pursuant to paragraph (c) of subsection 1 of NRS 704.6622.

3. If the public utility has previously submitted the results of the calculations conducted pursuant to paragraph (b) of subsection 1 to the Commission, and is submitting an update to the plan of water conservation, the supplier must also submit to the Commission:

(a) A comparison between the results of the new calculations and the previous calculations; and

(b) An analysis of any progress made by the public utility towards the goals for acceptable water loss established in the plan for water conservation pursuant to paragraph (c) of subsection 1 of NRS 704.6622.

4. The provisions of this section do not apply to a transient water system as defined in NRS 445A.848.

(Added to NRS by 2019, 2104, effective January 1, 2020)