| Natomas Basin (NB) |
| North Sacramento (NS) |
| American River/North Sacramento (AR/NS) |
| American River (AR) |
| American River/Sacramento River (AR/SR) |
| South Sacramento Streams Group (SSSG) |
| American River/South Sacramento Streams Group (AR/SSSG) |
| American River/Sacramento River/South Sacramento Streams Group (AR/SR/SSSG) |