R18-5-113. Classes of Facilities

A. The Department shall classify a facility in one of four classes: 1. Water treatment plant, 2. Water distribution system, 3. Wastewater treatment plant, or 4. Wastewater collection system. B. The Department shall classify a facility as one of four grades, Grades 1–4. The grade corresponds with the level of system complexity, with Grade 1 being the most simple and Grade 4 being the most complex. C. For a multi-facility system, the Department shall grade each facility according to complexity and the total population or population equivalent served.