1. Short title This Act may be cited as the Water Efficiency, Conservation, and Sustainability Act of 2023 . 2. Definitions In this Act: (1) Administrator The term Administrator means the Administrator of the Environmental Protection Agency. (2) Eligible entity The term eligible entity means any of the following: (A) A State, local, or Tribal government, or any special-purpose unit of such a government (including a municipal water authority). (B) A public water system. (C) A nonprofit organization. (3) Energy Star program The term Energy Star program means the Energy Star program established by section 324A of the Energy Policy and Conservation Act ( 42 U.S.C. 6294a ). (4) Low-income household The term low-income household means a household that meets the income qualifications established under— (A) section 2605(b)(2) of the Low-Income Home Energy Assistance Act of 1981 ( 42 U.S.C. 8624(b)(2) ); or (B) the Low-Income Household Drinking Water and Wastewater Emergency Assistance Program authorized by section 533 of division H of the Consolidated Appropriations Act, 2021 ( Public Law 116–260 ; 134 Stat. 1627). (5) Public water system The term public water system has the meaning given the term in section 1401 of the Safe Drinking Water Act ( 42 U.S.C. 300f ). (6) Water efficiency incentive program The term water efficiency incentive program means a program for providing incentives, including direct installation services, to residential, commercial, or industrial customers of a public water system for the purchase, lease, installation, use, or implementation, as applicable, of water-efficient upgrades. (7) Water-efficient upgrade (A) In general The term water-efficient upgrade means a product, landscape, label, process, or service for a residential, commercial, or industrial building, or the landscape of such a building, that is— (i) rated for water efficiency and performance under the WaterSense program or the Energy Star program