Hackensack R. 



Figure 1. The Hudson-Raritan Estuary study area. 



Mueller et al. (1982) estimated that wastewater treatment discharges contributed 40-60 percent of the 

 total input of several trace metals into the estuary. They estimated that 20-40 percent were contributed 

 by the tributary rivers, and 10-30 percent by urban runoff. The data available for estimating sources of 

 toxic organic compounds were less complete than those for metals. Based on the data available, waste- 

 water and the tributaries each contributed about 40 percent of the total PCB load, a substantial portion 

 being transported by the Hudson River. 



