Click on the 'Public Water System Name' for more detailed information   County: Mercer   PWSID# Public Water System Name 1101002 East Windsor MUA 1103001 Aqua New Jersey - Hamilton Square 1104001 Hightstown Water Department 1105001 Hopewell Borough Water Department 1106001 Hopewell Township Water and Sewer 1106002 Mercer County Correctional Center 1107001 Lawrenceville School 1107002 Lawrence Water Company 1108001 Pennington Water Department 1111001 Trenton Water Works