(a) the separate sources are the same source type, with:
- (1) the groundwater sources located in the same aquifer area; or
- (2) the surface water intakes located in the same water body and the intakes at the same approximate depth and location;
- (b) the water supply system or facility is owned and operated by the same person(s);
- (c) the water supply system or facility is operated for the same purposes and for the same time period; and
- (d) the water supply system or facility serves 25 or more people or 15 or more service connections.
A water supply system or facility with multiple distribution systems on separate sources of water supply shall be considered a single public water system if all the following conditions are met: