| Turtle Pond | NH | Lake/Reservoir/Pond | Not Supporting | 4 | 159 |
| Tuttle Brook | NH | Impoundment | Not Supporting | 1 | 1.00 |
| Tuxbury Pond | NH | Lake/Reservoir/Pond | Not Supporting | 4 | 77 |
| Tyler Tree Farm Dam | NH | Impoundment | Not Supporting | 1 | 3.21 |
| Ulrich Dam | NH | Impoundment | Not Supporting | 1 | 0.16 |
| Unanmed Brook - Trib to Dodge Brook | NH | Impoundment | Not Supporting | 1 | 0.38 |
| Unanmed Brook - Trib to Dodge Brook | NH | Impoundment | Not Supporting | 1 | 0.25 |
| Uncanoonuc Lake | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 23 |
| Uncanoonuc Lake - Mountain Base Beach | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 0.34 |
| Union Meadows | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 103 |
| Unknown Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 0.23 |
| Unknown Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 4.87 |
| Unknown Pond - Camp Glen Brook Beach | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 1.38 |
| Unknown River - Aversa Dam | NH | Impoundment | Not Supporting | 1 | 1.50 |
| Unknown River - Daley Dam | NH | Impoundment | Not Supporting | 1 | 0.46 |
| Unknown River - Recreation Pond | NH | Impoundment | Not Supporting | 1 | 0.02 |
| Unknown River - Recreation Pond | NH | Impoundment | Not Supporting | 1 | 0.10 |
| Upper Ammonoosuc River - Brooklyn Dam | NH | Impoundment | Not Supporting | 1 | 24 |
| Upper Ammonoosuc River - Godfrey Dam | NH | Impoundment | Not Supporting | 1 | 9.82 |
| Upper Ammonoosuc River - Red Dam | NH | Impoundment | Not Supporting | 1 | 30 |
| Upper Ammonoosuc River - Weston Dam | NH | Impoundment | Not Supporting | 1 | 27 |
| Upper Baker Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 165 |
| Upper Baker Pond - Camp Merriwood Beach | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 1.38 |
| Upper Baker Pond - Camp Moosilauke Beach | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 1.38 |
| Upper Beech Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 144 |
| Upper Carter Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 1.12 |
| Upper Damon Reservoir | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 49 |
| Upper Danforth Pond | NH | Lake/Reservoir/Pond | Not Supporting | 3 | 45 |
| Upper Freeses Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 30 |
| Upper Goodwin Point Pond | NH | Lake/Reservoir/Pond | Not Supporting | 3 | 34 |
| Upper Greeley Pond | NH | Lake/Reservoir/Pond | Not Supporting | 3 | 2.36 |
| Upper Hall Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 22 |
| Upper Kimball Lake | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 168 |
| Upper Moose Falls Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 25 |
| Upper Mountain Lake | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 23 |
| Upper Pequawket Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 20 |
| Upper Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 27 |
| Upper Suncook Lake - Camp Fatima Beach | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 1.38 |
| Upper Suncook Lake - Town Beach | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 0.22 |
| Upper Suncook Pond | NH | Lake/Reservoir/Pond | Not Supporting | 3 | 401 |
| Upper Three Ponds | NH | Lake/Reservoir/Pond | Not Supporting | 3 | 11 |
| Upper Wilson Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 7.38 |
| Upton Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 14 |
| Van Beuren Est Det Pond | NH | Impoundment | Not Supporting | 1 | 2.36 |
| Van Dyke Dam | NH | Impoundment | Not Supporting | 1 | 18 |
| Vick Dam | NH | Impoundment | Not Supporting | 1 | 0.13 |
| Vickery Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 5.32 |
| Vijverhof Pond Dam | NH | Impoundment | Not Supporting | 1 | 34 |
| Village at Barretts Hill Lower Pond | NH | Impoundment | Not Supporting | 1 | 2.00 |
| Village at Barretts Hill Upper Pond | NH | Impoundment | Not Supporting | 1 | 1.00 |