The New Jersey Harbor Dischargers Group (NJHDG) is a consortium of nine (9) sewerage agencies, representing eleven (11) wastewater treatment plants in northeastern New Jersey, which all discharge their treated effluents to the waters of the New York/New Jersey Harbor Estuary.  The NJHDG was formed in 1992 to jointly fund studies related to the water quality of the NY/NJ Harbor Estuary.

In 2003, the NJHDG initiated a Long-Term Ambient Water Quality Monitoring Program for the NJ portion of the NY/NJ Harbor Estuary.  The main objective of the NJHDG program is to develop a comprehensive database on the existing water quality of the NY/NJ Harbor by routinely and extensively monitoring the waters of the Passaic River, Hackensack River, Newark Bay, Arthur Kill, Raritan River, Raritan Bay, and the Hudson River.

Thirty-three (33) locations throughout the region are monitored for a list of eighteen (18) conventional chemical water quality parameters, including temperature, pH, dissolved oxygen (DO), salinity, solids, nutrients, and bacteria.  Monitoring is performed at each station weekly from May through September and monthly from October through April.  All resources for the monitoring program, including sampling personnel and laboratory analyses, are provided by the NJHDG member agencies.

See the attached link for further water quality information:

2010 New Jersey Harbor Dischargers Group (NJHDG) Water Quality Report [pdf 7.79MB]