(1) that is located in Montgomery County or Prince George’s County; and

(2) whose purpose is primarily charitable.

(b) Except as provided in subsection (c) of this section, if a charitable institution does not discriminate against the entrance or care of residents of Montgomery County or Prince George’s County, the Commission:

(1) shall supply without cost up to 100 gallons of water per day for each resident of the charitable institution; and

(2) may not charge the charitable institution a fee for sewer usage for the water supplied under item (1) of this subsection.

(c) (1) The charitable institution shall install and maintain a water meter at its own cost.

(2) The Commission may charge the charitable institution for:

(i) the cost of reading the water meter; and

(ii) sewer usage and water used in excess of 100 gallons per day for each resident of the charitable institution.