Island authorities must radically cut nitrogen pollution in the Edgartown Great Pond, state officials told a public hearing Wednesday at Edgartown town hall about the final report from the Massachusetts Estuaries Project.

The Massachusetts Department of Environmental Protection held the hearing to discuss the pond’s nitrogen problems and the requirement for a Comprehensive Wastewater Management Plan to limit nitrogen seeping into it.

The Massachusetts Department of Environmental Protection has levied a heavy fine against an Edgartown contractor who did the work on a Mink Meadows project last year that violated state and local wetlands laws.

In an administrative consent order issued June 29, Steve Handy of Handy Trucking and Bobcat Service was fined $11,000 by the DEP for the unpermitted dredging and filling work. Mr. Handy was ordered by the DEP to pay $4,500; the balance of the $11,000 fine will be suspended for three years as long as there are no further violations.