1. Short title This Act may be cited as the Decentralized Wastewater Grant Act of 2020 . 2. Decentralized wastewater grant program (a) In general Title II of the Federal Water Pollution Control Act ( 33 U.S.C. 1281 et seq.) is amended by adding at the end the following: 222. Grants for construction, repair, or replacement of individual household decentralized wastewater treatment systems (a) Definition In this section, the term eligible individual means a member of a household, the members of which have a combined income (for the most recent 12-month period for which information is available) equal to not more than 50 percent of the median nonmetropolitan household income for the State in which the household is located, according to the most recent decennial census. (b) Grant program The Administrator shall establish a program to provide a grant to a qualified nonprofit organization, as determined by the Administrator, to provide a subgrant to an eligible individual— (1) for the construction, repair, or replacement of an individual household decentralized wastewater treatment system; (2) if the eligible individual resides in a household that could be cost-effectively connected to an available publicly owned treatment works, for the connection of the household of the eligible individual to the publicly owned treatment works; or (3) for the installation of a larger decentralized wastewater system designed to provide treatment for 2 or more households in which eligible individuals reside, if— (A) site conditions at the households are unsuitable for the installation of an individually owned decentralized wastewater system; (B) multiple examples of unsuitable site conditions exist in close geographic proximity to each other