; (B) by striking subsection (a) $20,000,000 and inserting the following: subsection (a)— (1) $20,000,000 ; (C) in paragraph (1) (as so designated), by striking 2022. and inserting 2020; and ; and (D) by adding at the end the following: (2) $50,000,000 for each of fiscal years 2021 through 2024. . 13. Advanced drinking water technologies (a) Study (1) In general Subject to the availability of appropriations, not later than 1 year after the date of enactment of this Act, the Administrator of the Environmental Protection Agency (referred to in this section as the Administrator ) shall carry out a study that examines the state of existing and potential future technology that enhances or could enhance the treatment, monitoring, affordability, efficiency, and safety of drinking water provided by a public water system (as defined in section 1401 of the Safe Drinking Water Act ( 42 U.S.C. 300f )). (2) Report The Administrator shall submit to the Committee on Environment and Public Works of the Senate and the Committee on Energy and Commerce of the House of Representatives a report that describes the results of the study under paragraph (1). (b) Advanced drinking water technology grant program (1) Definitions In this subsection: (A) Eligible entity The term eligible entity means the owner or operator of a public water system that— (i) serves— (I) a population of not more than 100,000 people; or (II) an underserved community