; (B) a nontransient noncommunity water system; (C) a qualified nonprofit organization with experience in nitrate or arsenic reduction, as determined by the Administrator; and (D) a municipality or State, interstate, or intermunicipal agency, including a special-purpose unit of local government. (3) Nitrate reduction project The term nitrate reduction project means a project or activity the primary purpose of which is to reduce the concentration of nitrate in water for human consumption. (4) Low-income The term low-income , with respect to assistance under subsection (b)(4), has such meaning as may be given the term by the Governor of the State in which the eligible entity is located, based upon the affordability criteria established by the State under section 1452(d)(3). (5) Nontransient noncommunity water system The term nontransient noncommunity water system means a noncommunity water system that regularly serves at least 25 of the same persons over a 6 month period, or more, per year. (b) Grant program (1) Establishment Subject to the availability of appropriations, the Administrator shall establish a grant program to provide assistance to eligible entities for nitrate or arsenic reduction projects in the United States. (2) Precondition As a condition of receipt of assistance under this subsection, an eligible entity shall take steps to identify— (A) the source of nitrate or arsenic, as applicable, in the public water system that is subject to human consumption