This bill significantly enhances financial assistance for Indian Tribes under the Federal Water Pollution Control Act by amending existing provisions and authorizing new appropriations. It mandates that for each fiscal year, the Administrator shall reserve the greater of 2 percent of certain funds or $30,000,000 for grants to eligible tribal entities. These reserved funds are specifically designated for projects and activities related to water infrastructure, as well as for training, technical assistance, and educational programs concerning the operation and management of treatment works. In addition to these reserved funds, the bill authorizes an additional appropriation of $500,000,000 for each of fiscal years 2026 through 2031. These supplemental funds are also intended for grants to tribal entities, in cooperation with the Director of the Indian Health Service, to support similar water infrastructure projects and related training initiatives. A key provision for these additional grants is the waiver of any matching requirement , easing the financial burden on recipient tribes. Furthermore, specific labor standards and management assistance requirements of the Federal Water Pollution Control Act will apply to construction projects funded by these grants.