National Water-Quality Assessment Program
Unscheduled Study Units
These study units were not scheduled during Cycle I of NAWQA:
- Canadian-Cimarron River Basins (#32)
- Cheyenne and Belle Fourche Basins (#42)
- Kansas River Basin (#36)
- Kentucky River Basin (#25)
- Middle Arkansas River Basin (#38)
- North Platte Basin (#41)
- Southern High Plains (#39)
- Upper Arkansas River Basin (#37)