; (B) in paragraph (5), by striking $4,000,000 for each of fiscal years 2019 and 2020 and inserting $10,000,000 for each of fiscal years 2021 through 2024 ; (C) by redesignating paragraph (5) as paragraph (6); and (D) by inserting after paragraph (4) the following: (5) Federal share for underserved communities (A) In general Subject to subparagraph (B), with respect to a program or project that serves an underserved community and is carried out using a grant under this subsection, the Federal share of the cost of the program or project shall be 90 percent. (B) Waiver The Administrator may increase the Federal share under subparagraph (A)(ii) to 100 percent. . (b) Connection to public water systems Section 1459A of the Safe Drinking Water Act ( 42 U.S.C. 300j–19a ) is amended by adding at the end the following: (m) Connection to public water systems (1) Definitions In this subsection: (A) Eligible entity The term eligible entity means— (i) an owner or operator of a public water system that assists or is seeking to assist eligible individuals with connecting the household of the eligible individual to the public water system