Section 12-401 - Classification of waterworks, wastewater works, and industrial wastewater works(a) The Secretary shall classify all waterworks, wastewater works, and industrial wastewater works in this State.(b) In determining the classification of a waterworks, wastewater works, or industrial wastewater works, the Secretary shall consider: (1) The size or capacity of the facility;(2) The type of treatment used;(3) The character of the water or wastes treated; and(4) Any other physical conditions that affect the facility.