A bill to amend the Federal Water Pollution Control Act to provide for the enhanced water quality of the Chesapeake and Narragansett Bays, and for other purposes.

Amends the Federal Water Pollution Control Act (also known as the Clean Water Act) to direct the Administrator of the Environmental Protection Agency, at the request of the Governor of a State affected by the interstate management plan developed under the Chesapeake Bay program, to make a grant to implement management mechanisms in the plan if the State has, within one year after the date of enactment of this Act, approved and committed to implement all or substantially all aspects of the plan. Limits such grants to 55 percent of the plan implementation costs in any year and requires State expenditure of non-Federal funds to cover at least 45 percent of such costs during such fiscal year.

Directs the Administrator to continue the Chesapeake Bay program for: (1) assessing the relationship between point and nonpoint source pollution and the impact of such pollution on water quality; and (2) research on the impact of pollutant loadings, particularly nutrients, on bay fisheries resources (with special attention to be given to the striped bass).

Directs the Administrator to immediately begin to: (1) assess the principal factors having an adverse effect on the environmental quality of Narragansett Bay, as perceived by both scientists and users; and (2) direct and coordinate, subsequent to a review of presently ongoing research, research and abatement programs that will most efficiently address those factors. Directs the Administrator to: (1) analyze all environmental sampling data presently being collected on Narragansett Bay and undertake methods of improving such data collection; (2) establish a continuing capacity for collecting, storing, analyzing, and disseminating such data; (3) institute a sampling program where present programs are deficient; and (4) determine what units of government have management responsibility for the environmental quality of the bay and how such responsibility can be structured to improve coordination among units of government, research and educational institutions, and concerned groups and individuals.

Authorizes appropriations for FY 1983 through 1987 to carry out Chesapeake and Narragansett Bays programs.