; or (ii) any other category of water body or feature excluded by the Administrator in accordance with subparagraph (C). (C) Review and modifications (i) Review required Not later than 1 year after the date of enactment of the Clean Water Act of 2023 , and periodically thereafter, the Administrator shall, by rule, review the categories of water body or feature excluded under subparagraph (B) to determine, based on the best available scientific evidence, whether the implementation of such exclusions, or any individual exclusion, has a significant cumulative adverse effect on— (I) the chemical, physical, or biological integrity of— (aa) the waters described in subparagraph (A); or (bb) surface waters, other than those described in subparagraph (A), that are sources of water for public water systems, as such term is defined in section 1401 of the Safe Drinking Water Act ( 42 U.S.C. 300f ); (II) environmental justice communities; or (III) water resources described in section 518(e)(2). (ii) Modifications and removal If the Administrator determines under clause (i) that the implementation of the exclusions, or any individual exclusion, under subparagraph (B) has a significant adverse effect described in clause (i), the Administrator shall, by rule and concurrent with such determination— (I) modify the category of water body or feature so excluded to ensure that, based on the best available scientific evidence, the implementation of such category will not have a significant cumulative adverse effect described in clause (i); or (II) remove such category. (iii) Additional exclusions The Administrator may, by rule, exclude an additional category of water body or feature under subparagraph (B) if the Administrator determines, based on the best available scientific evidence, that the implementation of such additional exclusion will not have a significant cumulative adverse effect described in clause (i).