This bill establishes a new Hawaiian Islands Program within the Environmental Protection Agency to address water quality and pollution issues unique to Hawaii. The program will be led by a director based in Hawaii who will coordinate funding, research, and public education efforts related to the state's watersheds and coastal waters. A management conference composed of federal, state, local government officials, nonprofits, and Native Hawaiian organizations will develop a comprehensive action plan within three years, focusing on converting failing septic systems (cesspools), restoring aquifer water quality, and managing coastal wetlands. The bill authorizes fifty million dollars annually for fiscal years 2028 through 2032, with no more than four percent of funds available for administrative costs. The comprehensive action plan will be revised every five years, and the director will fund eligible projects and activities identified on an annual priority list developed by the management conference.