| Tenmile Lake | WI | Reservoir | Not Supporting | 1 | 266 |
| Tenmile Pond | FL | Lake, Freshwater | Not Supporting | 3 | 109 |
| Tennessee River (Lake Guntersville) | AL | Reservoir | Fully Supporting | 0 | 8,634 |
| Tennessee River (Lake Guntersville) | AL | Reservoir | Fully Supporting | 0 | 10,177 |
| Tennessee River (Lake Guntersville) | AL | Reservoir | Fully Supporting | 0 | 20,440 |
| Tennessee River (Lake Guntersville) | AL | Reservoir | Fully Supporting | 0 | 2,400 |
| Tennessee River (Pickwick Lake) | AL | Reservoir | Fully Supporting | 0 | 1,112 |
| Tennessee River (Pickwick Lake) | AL | Reservoir | Fully Supporting | 0 | 2,424 |
| Tennessee River (Wheeler Lake) | AL | Reservoir | Not Supporting | 1 | 4,271 |
| Tennessee River (Wheeler Lake) | AL | Reservoir | Not Supporting | 1 | 2,587 |
| Tennessee River (Wheeler Lake) | AL | Reservoir | Not Supporting | 1 | 2,780 |
| Tennessee River (Wheeler Lake) | AL | Reservoir | Not Supporting | 1 | 13,441 |
| Tennessee River (Wheeler Lake) | AL | Reservoir | Not Supporting | 1 | 1,346 |
| Tennessee River (Wheeler Lake) | AL | Reservoir | Not Supporting | 1 | 334 |
| Tennessee River (Wilson Lake) | AL | Reservoir | Not Supporting | 1 | 13,363 |
| Tenney Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 7.18 |
| Tennyson | MN | Lake, Freshwater | Not Supporting | 1 | 112 |
| Tensaw Lake | AL | Lake, Freshwater | Fully Supporting | 0 | 437 |
| Tenth Crow Wing | MN | Lake, Freshwater | Not Supporting | 1 | 174 |
| Tepee Lake | MI | Lake, Freshwater | Not Supporting | 1 | 123 |
| Terrace Lakes | ID | Lake, Freshwater | Fully Supporting | 0 | 7.95 |
| Terrace Reservoir. | CO | Lake/Reservoir/Pond | Not Supporting | 3 | 142 |
| Terramuggus, Lake (Marlborough) | CT | Lake, Freshwater | Fully Supporting | 0 | 81 |
| Terrell Lake | WA | Lake/Reservoir/Pond | Not Supporting | 1 | 404 |
| Terror Lake | NY | Lake/Reservoir/Pond | Not Supporting | 2 | 82 |
| Terry Lake | MI | Lake, Freshwater | Not Supporting | 2 | 12 |
| Terrys Run/Lake Anna | VA | Reservoir | Not Supporting | 3 | 431 |
| Tetagouche | MN | Lake, Freshwater | Not Supporting | 1 | 67 |
| Tetonka | MN | Lake, Freshwater | Not Supporting | 2 | 1,336 |
| Teufer | MN | Lake, Freshwater | Not Supporting | 1 | 38 |
| Tew Lake-Located within subsegment LA081301_00. This unit is added for advisory tracking purposes only and is not a subsegment as defined by LAC 33:IX.1123.A. et seq. No other assessment is made for this water body. | LA | Lake, Freshwater | Not Supporting | 1 | 235 |
| Tewksbury Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 47 |
| Texoma Lake | OK | Lake, Freshwater | Not Supporting | 1 | 15,743 |
| Texoma Lake, Red River Arm, Lower | OK | Lake, Freshwater | Not Supporting | 1 | 31,081 |
| Texoma Lake, Red River Arm, Upper | OK | Lake, Freshwater | Not Supporting | 2 | 11,466 |
| Texoma Lake, Washita River Arm, Lower | OK | Lake, Freshwater | Not Supporting | 3 | 19,214 |
| Texoma Lake, Washita River Arm, Upper | OK | Lake, Freshwater | Not Supporting | 1 | 6,925 |
| Thayer Lake | IA | Lake | Fully Supporting | 0 | 14 |
| Thayer New City Lake | KS | Lake | Fully Supporting | 0 | 45 |
| Thayer Old City Lake | KS | Lake | Fully Supporting | 0 | 26 |
| Thayers Lake | MI | Lake, Freshwater | Not Supporting | 1 | 127 |
| The Channel | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 8.89 |
| The Lake in Central Park | NY | Lake/Reservoir/Pond | Not Supporting | 1 | 15 |
| The Overflow | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 58 |
| The Pogue | VT | Lake, Freshwater | Fully Supporting | 0 | 11 |
| The Quag | MA | Lake, Freshwater | Not Supporting | 2 | 32 |
| The Reservoir | RI | Lake, Freshwater | Not Supporting | 1 | 21 |
| Thermalito Afterbay | CA | Lake/Reservoir/Pond | Not Supporting | 1 | 4,037 |
| Thermalito Diversion Pool | CA | Lake/Reservoir/Pond | Fully Supporting | 0 | 298 |
| Thermalito Forebay | CA | Lake/Reservoir/Pond | Not Supporting | 1 | 563 |