In-water hull cleaning is allowed in all states. The exception is Washington, where ablative or sloughing paints
may not be cleaned. That being said, there are also individual marinas that will not allow in-water hull cleaning. So unless your boat lives in such a marina, go ahead and clean your hull. However, actually "scraping" your hull is frowned upon, not only by many federal and state agencies, but by reputable professional hull cleaners as well. If your hull is so badly fouled that you do need to use a blade to clean it, please haul and paint
. There is increasing pressure nationwide to reduce nonpoint source pollution (of which in-water hull cleaning is a cause) and scraping boat hulls only adds fuel
to the fire of those who say you shouldn''t be able to perform in-water hull cleaning at all.