Currently (2022), this dataset represents approximately 1,304 culinary water suppliers. Two systems are represented with two polygons each, because they cross county lines. The Division of Water Resources needs these systems to be separated at county boundaries for analysis and calculation purposes. The systems include public community, public non-community (transient), self-supplied industry (non-transient), and non-public water suppliers. This feature class includes system boundaries that are historical and no longer active. It also includes some systems that are outside the state. Historical and outside the state systems can be filtered using the ENDYEAR and STATE fields, respectively. SYSTEMTYPE = C (Community) AND ENDYEAR IN (2020) will give currently active public community suppliers within the state. Other supplier types can be further filtered using the SYSTEMTYPE field.

These boundaries are derived from many different sources. They include spatial data received directly from the supplier, municipal boundaries, phone call descriptions of service areas, printed maps that had hand-drawn boundaries that were then digitized, etc.