| Presumpscot River At Westbrook, ME |
| Saco River At Cornish, ME |
| Sandy River Near Madrid, ME |
| Sandy River Near Mercer, ME |
| Seboeis River Near Shin Pond, ME |
| Sheepscot River At North Whitefield, ME |
| Spencer Stream Near Grand Falls, ME |
| St. Croix River At Baring, ME |
| St. Croix River At Vanceboro, ME |
| St. Francis River Near Connors, New Brunswick, ME |
| St. John River At Dickey, ME |
| St. John River At Ninemile Bridge, ME |
| St. John River Below Fish R, Near Fort Kent, ME |
| Stony Brook At East Sebago, ME |
| Swift River Near Roxbury, ME |
| Wild River At Gilead, ME |
| Williams Brook At Phair, ME |
| Wytopitlock Stream Near Wytopitlock ME |
