Maryland Environment Section 12-401

      (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.