Authorizes $500,000,000 per year for fiscal years 2027 through 2031 for the Great Lakes Restoration Initiative by amending the Federal Water Pollution Control Act. The change adds a new subclause to permit that level of annual authorization; it does not itself appropriate the money but sets the authorized funding level for future appropriations.

The amendment also makes minor punctuation edits to existing statutory subclauses to accommodate the new insertion. Implementation would rely on EPA and federal grant programs to distribute funds to projects, states, tribes, and local partners if and when Congress provides appropriations at those levels.