| North Elm Creek At Rosebud Rd Near Meeks, TX |
| North Fork Guadalupe River Near Hunt, TX |
| North Fork Red River Near Shamrock, TX |
| North Fork San Gabriel River At Reagan Blvd Near Leander, TX |
| North Fork San Gabriel River Near Georgetown, TX |
| North Llano River Near Junction, TX |
| North Sulphur River Near Cooper, TX |
| North Wichita River Near Truscott, TX |
| Nueces River At Bluntzer, TX |
| Nueces River At Calallen, TX |
| Nueces River At Cotulla, TX |
| Nueces River At Creek 414 At Montell, TX |
| Nueces River At Laguna, TX |
| Nueces River Below Uvalde, TX |
| Nueces River Near Asherton, TX |
| Nueces River Near Barksdale, TX |
| Nueces River Near Mathis, TX |
| Nueces River Near Three Rivers, TX |
| Nueces River Near Tilden, TX |
| Olmos Creek At Dresden Dr, San Antonio, TX |
| Onion Creek At Twin Creeks Rd Near Manchaca, TX |
| Onion Creek At Us Hwy 183, Austin, TX |
| Onion Creek Near Driftwood, TX |
| Oso Creek At Corpus Christi, TX |
| Palo Duro Creek Near Spearman, TX |
| Paluxy River At Glen Rose, TX |
| Panther Brook At Gosling Rd, The Woodlands, TX |
| Panther Brook Near Spring, TX |
| Peach Creek At Splendora, TX |
| Peach Creek Below Dilworth, TX |
| Pease River Near Vernon, TX |
| Pecan Bayou Near Mullin, TX |
| Pecan Creek Near San Angelo, TX |
| Pecos River At Brotherton Rh Near Pandale, TX |
| Pecos River At Pecos, TX |
| Pecos River At Rr 1776 Near Grandfalls, TX |
| Pecos River Near Girvin, TX |
| Pecos River Near Orla, TX |
| Pecos River Near Sheffield, TX |
| Pedernales River Near Fredericksburg, TX |
| Pedernales River Near Johnson City, TX |
| Perdido Creek At Fm 622 Near Fannin, TX |
| Pine Island Bayou Above Bi Pump Plant, Beaumont, TX |
| Pine Island Bayou Near Sour Lake, TX |
| Placedo Creek Near Placedo, TX |
| Plum Creek At Lockhart, TX |
| Plum Creek Near Luling, TX |
| Pr Dog Twn Fork Red River Near Brice, TX |
| Pr Dog Twn Fork Red River Near Childress, TX |
| Pr Dog Twn Fork Red River Near Wayside, TX |
