NDZ's
Looks like this misunderstanding and the misinformation on this topic is going to go on forever.... In the U.S., the use of the term No Discharge Zone means that you cannot discharge toilet waste into the water in that area, whether it's been treated or not. Period. the end. In those areas, ONLY a holding tank is acceptable. But in all other areas, treated waste from a coast guard certified treatment unit, may be discharged into the water. The first thing you need to ask when someone mentions that an area is No Discharge, is a definition of what they're actually saying - assuming that they actually know what they're saying. Along both U.S. coastlines and the Gulf, there are relatively few actual No Discharge Zones. Inland rivers also permit the use of certified treatment systems as long as those rivers are navigable all the way out to the ocean or the Gulf (Ohio River, as an example). Just about all landlocked lakes in the U.S. are No Discharge. At the present time, Lake Cumberland in Kentucky DOES allow the use of treatment systems, although they've been making some noises in the opposite direction. Puget Sound, San Francisco Bay and Chesapeake Bay are NOT No Discharge Zones, and treatment systems may be used there. Herring Bay (Deale, MD) is the one and only No Discharge Zone on the entire Chesapeake - and that is a fairly small area when considering the size of the Bay as a whole.Untreated waste from either a toilet or a holding tank is another issue completely. It has been illegal to discharge untreated waste ANYWHERE in the U.S., inside the 3 mile limit since 1980. So yes, if you're talking about direct discharge from a marine toilet, the entire U.S. is "No Discharge." But discharge from waste that has been treated is only disallowed in certain areas.Here's the list of No Discharge Zones, by state, from the EPA website (the EPA makes the restrictions, and the Coast Guard enforces them) http://www.epa.gov/owow/oceans/regulatory/vessel_sewage/vsdnozone.html