Delaware River Basin Conservation Reauthorization Act of 2023

This bill reauthorizes the Delaware River Basin Conservation program through 2030, extending its current deadline. It updates the basin's definition to include Maryland as a fifth participating state (previously a four-state basin) and adjusts cost-sharing rules to provide greater federal funding for projects serving small, rural, or disadvantaged communities - increasing the federal share to 90% (or up to 100% in cases of financial hardship). The changes directly affect the five basin states (Delaware, New Jersey, New York, Pennsylvania, and now Maryland) and communities qualifying under the new cost-sharing provisions. The bill makes no new program creation but extends existing conservation funding mechanisms with expanded eligibility for vulnerable areas.