1. Short title This Act may be cited as the Drinking Water Infrastructure Act of 2020 . 2. Host communities Section 1433(g) of the Safe Drinking Water Act ( 42 U.S.C. 300i–2(g) ) is amended— (1) in paragraph (1)— (A) by striking the period at the end and inserting ; or ; (B) by striking for the purpose of increasing and inserting the following: for the purpose of— (A) increasing ; and (C) by adding at the end the following: (B) increasing the capacity of the community water system to adapt to an increase in population served by the community water system that is primarily caused by a natural hazard or a malevolent act in another community or State. ; (2) in paragraph (5)— (A) in the heading, by striking small and inserting small, rural, and disadvantaged ; (B) by striking a population of less than 3,300 persons and inserting disadvantaged communities or populations of fewer than 10,000 persons ; and (C) by striking of this section ; and (3) in paragraph (6), by striking fiscal years 2020 and 2021 and inserting fiscal years 2021 and 2022 . 3. Technical assistance and grants for emergencies affecting public water systems Section 1442 of the Safe Drinking Water Act ( 42 U.S.C. 300j–1 ) is amended— (1) in subsection (b), in the first sentence, by inserting , including a threat to public health resulting from contaminants, such as, but not limited to, heightened exposure to lead in drinking water after public health ; (2) by striking subsection (d) and inserting the following: (d) Authorization of appropriations There is authorized to be appropriated to carry out subsection (b) $35,000,000 for each of fiscal years 2021 through 2024.