Oregon Revised Statutes Utility Regulation § 757.061

(a) “Rate regulation” means regulation under this chapter, except for regulation under ORS 757.105 to 757.110.

(b) “Service regulation” means regulation under this chapter, except for regulation under ORS 757.105 to 757.110, 757.140, 757.205 to 757.220, 757.225, 757.245, 757.259, 757.355, 757.400 to 757.460, 757.485, 757.490, 757.495 and 757.500.

(a) A water utility that serves 500 or more customers.

(b) A water utility that serves fewer than 500 customers, if the water utility also provides wastewater services to the public inside the boundaries of a city.

(c) A water utility that serves fewer than 500 customers, if the Public Utility Commission grants a petition from the water utility requesting that the water utility be subject to rate regulation.

(d) A water utility that satisfies all of the following conditions:

(a) A water utility that serves fewer than 500 customers and that is found by the commission, pursuant to an investigation under ORS 756.515, to have provided inadequate or discriminatory service at any time.

(b) A water utility that serves fewer than 500 customers and that at any time charges an average annual residential rate of $24 per month or more.

(5)(a) The commission shall adopt rules establishing maximum rates for water utilities serving fewer than 500 customers for the purpose of determining whether a petition may be filed under subsection (3)(d)(C) of this section.

(b) To encourage metered water systems for water utilities serving fewer than 500 customers, the commission shall establish a higher maximum rate for water utilities with metered water systems than for water utilities with unmetered systems.