Unfortunately, there is nowhere on the earth - nowhere - where garbage does not wash on shore with near-constant frequency. Aside from the garbage we toss out there (Ocean dumping of trash is still common) what do you think happens to all the stuff that was washed out to sea in the hurricanes and tsumanis?
Out in the middle of the ocean, there are vast (hundreds of miles wide) discs of trash where ocean currents form a giant eddy.

But anyway -

You never did solve the water problem! That's a biggie!