40 CFR 191.22 - Definitions.
Unless otherwise indicated in this subpart, all terms have the same meaning as in subparts A and B of this part.
Public water system means a system for the provision to the public of piped water for human consumption, if such system has at least fifteen service connections or regularly serves at least twenty-five individuals. Such term includes:
(2) Any collection or pretreatment storage facilities not under such control which are used primarily in connection with such system.
Underground source of drinking water means an aquifer or its portion which:
(1) Supplies any public water system; or
(i) Currently supplies drinking water for human consumption; or