what else is happening in the Hudson River?
Effect of PCB’s on New York City’s Reservoirs
Effect of PCB’s on New York City’s Watersheds
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Excerpt:
Besides the direct movement of PCB’s through the Hudson River, another mode of transfer that needs to be considered is through the air. The ecological impact of airborne PCBs on the New York City watershed that the river emits into the air – which in 1997 amounted to about two-thirds of the PCBs dissolved in the river.
Results also show that the airborne PCBs that have been deposited on the watershed, chiefly the more highly chlorinated (and generally more toxic) congeners, tend to accumulate there in vegetation, soil and reservoir sediments. In warm summer temperatures the accumulated PCBs vaporize; re-emitted into the air, they give rise to the unusually high airborne PCB concentration that have been measured at Frost Valley in the Neversink watershed: 1740 picograms per cubic meter.
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