; (B) are likely to increase the water management flexibility and reduce impacts on environmental resources; (C) are regional in nature; (D) involve multiple stakeholders; (E) provide multiple benefits, including water supply reliability, ecosystem benefits, groundwater management and enhancements, and water quality improvements; (F) would benefit low-income communities; or (G) would protect communities particularly at-risk to climate change and environmental degradation. . (b) Authorization of appropriations Section 1602(g) of the Reclamation Wastewater and Groundwater Study and Facilities Act ( 43 U.S.C. 390h(g) ) is amended— (1) in paragraph (1), by striking $50,000,000 and inserting $500,000,000 ; and (2) in paragraph (2), by striking if enacted appropriations legislation designates funding to them by name, . (c) Limitation on funding Section 1631(d)(1) of the Reclamation Wastewater and Groundwater Study and Facilities Act ( 43 U.S.C. 390h–13(d)(1) ) is amended by striking $20,000,000 (October 1996 prices) and inserting $30,000,000 (January 2019 prices) . (d) Duration Section 4013 of the Water Infrastructure Improvements for the Nation Act ( 43 U.S.C. 390b note; Public Law 114–322 ) is amended— (1) in paragraph (1), by striking and ; (2) in paragraph (2), by striking the period and inserting ; and ; and (3) by adding at the end the following: (3) the amendment made by section 4009(c). . (e) Programs for alternative water source projects Section 220 of the Federal Water Pollution Control Act ( 33 U.S.C. 1300 ) is amended to read as follows: 220. Program for alternative water source projects (a) Definitions In this section: (1) Alternative water source project (A) In general The term alternative water source project means a project that— (i) is designed to provide municipal, industrial, or agricultural water supplies in an environmentally sustainable manner by conserving, managing, reclaiming, or reusing water, wastewater, or stormwater, or by treating wastewater or stormwater