Mercury contamination has been a major pollution issue. Between 1946 and 1970, 165,000 pounds of mercury was discharged into Onondaga Lake by Allied Chemical and Dye Corporation. In 2002, the findings from the remedial investigation conducted by successor Honeywell, Inc., with the supervision of the New York State Department of Environmental Conservation (NYSDEC), reported that mercury contamination was found throughout the lake: the most elevated concentrations were in the sediments of the Ninemile Creek delta and of the southwestern portion of the lake. A fishing ban was imposed in 1970 due to mercury contamination.