This regulation revises the allotment formula for allotting funds appropriated under section 106 of the Clean Water Act (CWA) to interstate agencies for use in implementing specific elements of Clean Water Act programs. Section 106 of the CWA authorizes the Environmental Protection Agency (EPA) to provide grants to states, interstate agencies, and Indian tribes qualified under CWA section 518(e) to assist them in administering programs for the prevention, reduction, and elimination of water pollution. The allotment formulas for the state and tribal portions of the CWA section 106 Grant Program are not affected by this action.