Recreational Boating Act of 2007 - Amends the Federal Water Pollution Control Act (popularly known as the Clean Water Act) to redefine the term "pollutant" to exclude any deck runoff from a recreational vessel, any engine cooling water, gray water, bilge water effluent from a properly functioning recreational marine engine, laundry, shower, and galley sink waste from a recreational vessel, or any other discharge incidental to the normal operation of a recreational vessel. Declares that such exclusion does not apply to rubbish, trash, garbage, or any other similar material discharged overboard by a recreational vessel.
Defines "recreational vessel" to mean a vessel that is: (1) manufactured for operation, or operated primarily for recreational purposes; or (2) leased, rented, or chartered to an individual for recreational purposes.