This is the website I was referring to in my earlier post. A list of things that can be used to clean your boat & is suppose to be environmentally safe. However, I do not know if the NH DES approves of this list.
Its interesting that while perusing the DES website I could not find anything about washing boats in the water or humans soaping up in the water. Maybe I did not look hard enough. But it did talk about marinas washing boats out of the water.
http://boatsafe.com/nauticalknowhow/vessel_cleaning.htm