In Alexandria, New Hampshire, several convenient RV dumping options exist.- You can visit the Bristol Wastewater Treatment Plant, which provides dumping facilities for black and gray water.- Another option is Davidson's Countryside Campground, where you'll find a dump station, fresh water, and a hose for flushing tanks.- The Transfer Station & Recycling Center also offers an RV trash bin and waste disposal services.- Lastly, Ames Brook Campground provides a dump station for your convenience.