basin-fill aquifers; groundwater; correlative rights

HB 2415 modifies Arizona's groundwater regulations for small non-irrigation wells and establishes new rules for basin-fill aquifers. It requires wells in areas with "correlative rights" (where groundwater use is shared among users) to follow specific benefit use limits, and sets a 56-acre-foot annual limit for multiple exempt wells serving the same location. Property owners with small wells (under 35 gallons per minute) must comply with these rules, including a 10-acre-foot yearly cap for non-domestic uses in most active management areas. The bill also restricts drilling new exempt wells within 100 feet of municipal water systems unless owners prove service is unavailable or prohibitively expensive.