fppf
Contributor
Yeah, don't worry, its almost a dead port now.
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If its that big of an issue haul the boat into dry dock.
I don't know about New York, but in California, boatyards are required to capture and filter the water they generate during pressure washing operations. The solids they filter must be handled and disposed of as hazardous material. Very expensive....they just lift it up and pressure wash it off. I think here if you don't use anything but water you can let it go down the drain.