Caldwell Sanitation Department 1 Provost Sq Caldwell, NJ 07006 Phone : (973) 403-4640 Business Category Environmental Conservation & Ecological Services Caldwell Borough Of--public Works-sanitation 1 Provost Sq Caldwell, NJ 07006 Phone : (973) 403-4640 Business Category Government Offices-City Village & Twp Highway & street construction Road Maintenance Government Offices State & Local Government Offices & Public Schools