Boats operating within the three-mile limit with holding tanks or porta-potties must use pump outs or porta-potty dumping stations to dispose of sewage. The three pump-out facilities along the New Hampshire coast can handle wastes from holding tanks and, at Great Bay, porta-potties. To minimize your use of on-board toilets, use restrooms on shore whenever possible.
| Waterbody | Marina Name | Town | Phone Number | GPS Coordinates |
| Cocheco River | George's Marina | Dover | (603) 742-9089 | N 43 11.891 W 70.52.072 |
| Little Bay | Great Bay Marine | Newington | (603) 436-5299 | N 43 06.945 W 70 50.165 |
| Little Bay | Little Bay Boating Club | Dover | (603) 749-9282 | N 43 07.300 W 70 50.017 |
| Little Harbor | Wentworth by the Sea Marina | New Castle | (603) 433-5050 | N 43 03.492 W 70 43.525 |
| Hampton Harbor/River | Hampton River Marina | Hampton | (603) 929-1422 | N 42 54.117 W 70 49.088 |
Information for this page provided by the N.H. Department of Environmental Services.