Inner Management Zones (groundwater) (0)
| Inner Management Zone |
Source Water Protection Areas (groundwater) (1)
| Source Water Protection Area |
Inland (surface water) (2)
| Emergency Management Zone |
| Corridor Management Zone |
| Source Water Area Watershed |
Lake Erie (surface water) (3)
| Lake Erie-Critical Assessment Zone |
| Lake Erie-Potential Influence Zone |
Ohio River (surface water) (4)
| Ohio River-Zone of High Concern |
| Ohio River-Zone of Critical Concern |
Ohio River (surface water) (5)
| Ohio River-Source Water Area Watershed |
|