12 Digit Hydrologic Units (0)
10 Digit Hydrologic Units (1)
8 Digit Hydrologic Units (2)
6 Digit Hydrologic Units (3)
6 Digit Hydrologic Units (4)
| Big Sandy |
| Green |
| Hatchie-Obion |
| Kentucky |
| Licking |
| Lower Cumberland |
| Lower Mississippi-Memphis |
| Lower Ohio |
| Lower Ohio-Salt |
| Lower Tennessee |
| Middle Ohio-Little Miami |
| Middle Ohio-Raccoon |
| Scioto |
| Upper Cumberland |
| Upper Mississippi-Meramec |
| Upper Tennessee |
| <all other values> |
8 Digit Hydrologic Units (5)
| 05070201 |
| 05070202 |
| 05070203 |
| 05070204 |
| 05090103 |
| 05090104 |
| 05090201 |
| 05090203 |
| 05100101 |
| 05100102 |
| 05100201 |
| 05100202 |
| 05100203 |
| 05100204 |
| 05100205 |
| 05110001 |
| 05110002 |
| 05110003 |
| 05110004 |
| 05110005 |
| 05110006 |
| 05130101 |
| 05130102 |
| 05130103 |
| 05130104 |
| 05130105 |
| 05130205 |
| 05130206 |
| 05140101 |
| 05140102 |
| 05140103 |
| 05140104 |
| 05140201 |
| 05140202 |
| 05140203 |
| 05140205 |
| 05140206 |
| 06040005 |
| 06040006 |
| 08010100 |
| 08010201 |
| 08010202 |
|
