Inland Empire Regional Water Recycling Initiative - Amends the Reclamation Wastewater and Groundwater Study and Facilities Act to authorize the Secretary of the Interior: (1) in cooperation with the Inland Empire Utilities Agency, to participate in the design, planning, and construction of the Inland Empire regional water recycling project; and (2) in cooperation with the Cucamonga Valley Water District, to participate in the design, planning, and construction of the Cucamonga Valley Water District satellite recycling plants in Rancho Cucamonga, California, to reclaim and recycle approximately two million gallons per day of domestic wastewater. Limits the Federal share of the cost of each project to 25 percent.