RE: All You Need to Know About Greywater Discharge From Ships - Ocean Conservation News
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I have lived in a number of countries where all wastewater other than sewage simply ran down the communal drains into a nearby river. It is pretty nasty.
I hope the boats use some sort of filtration to limit at least some of this. To be honest, the sewage might actually be better for the ocean than the detergents and what not because as nasty as it sounds, fish will eat that. well, not paper but i think you know what i mean.
Good stats, I have never been on a cruise so I never bothered to look up any of this information. Pretty frightening stuff.
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The only place I know of that as regulations where cruise ships must process their waste water before dumping its is Alaska, but the ships still sometimes illegally dump and there is not enough enforcement. There are various wastewater regulations all over, like in the United States many ports will not allow een small vessels to dump near the coast, they must go out a few miles first before dumping directly into the water. There of course are many marinas that have sewage and greywater dumping access, much like an RV.
I think its Italy that just banned large cruise ships from entering certain historical waters. I will have to double check and post about it.