The State of New York waters in the Hudson River from
the Battery in Manhattan to the Federal Dam in Troy are
designated a No-Discharge Zone (NDZ).

Under the Clean Water Act, Section 312, all vessels 
operating within a No-Discharge Zone(NDZ) are completely 
prohibited from discharging any sewage, treated or 
untreated, into the waters. All vessels with an installed
marine sanitation device (MSD) that are navigating, moored,
anchored or docked within a NDZ must have the MSD
disabled to prevent the overboard discharge of sewage
(treated or untreated) or install a holding tank. Regulations
for the NDZ are contained in the U.S. Coast Pilot.
Additional information concerning the regulations and 
requirements may be obtained from the Environmental
Protection Agency (EPA) web site: http://www.epa.gov/ 
owow/oceans/regulatory/vessel_sewage/.

