As usual, the point that it has been illegal to discharge raw sewage within three nautical miles of the U.S. coast since 1972, has been ommitted. This ommission makes boaters look far more culpable in water pollution issues than they probably are, and makes No Discharge Zones (NDZ) sound like a great solution. The "No Discharge Zone" designation goes a step further than existing law, and bans discharge of TREATED sewage from a small number of vessels which have onboard treatment systems. These system must be USCG certified to work as well as most waste water treatment plants for household waste. Bottom line is it has been illegal to discharge RAW sewage from boats for over 30 years. If some are disobeying this law, they should be punished but it's unfair to say that a NDZ will radically change things by banning discharge of TREATED sewage.