| Great Lakes Drainage River Monitoring Sites | |||
| Station Name | State | Status | HUC-6 |
| Lake Superior | |||
| Pigeon River at Middle Falls nr Grand Portage | MN | Active | 040101 |
| Louis River at Scanlon | MN | Active | 040102 |
| Nemadji River nr South Superior | WI | Active | 040103 |
| Montreal River at Saxon Falls nr Saxon | WI | Active | 040103 |
| White River nr Ashland | WI | Active | 040103 |
| Bad River nr Odanah | WI | Active | 040103 |
| Presque Isle River nr Tula | MI | Inactive | 040201 |
| Ontonagon River nr Rockland | MI | Active | 040201 |
| Sturgeon River nr Arnheim | MI | Inactive | 040201 |
| Tahquamenon River nr Paradise | MI | Active | 040202 |
| Lake Michigan | |||
| Oconto River nr Oconto | WI | Active | 040301 |
| Peshtigo River at Peshtigo | WI | Active | 040301 |
| Menominee River nr McAllister | WI | Active | 040301 |
| Ford River nr Hyde | MI | Active | 040301 |
| Escanaba River at Cornell | MI | Active | 040301 |
| Fox River at Oil Tank Depot | WI | Active | 040302 |
| Burns Ditch at Portage | IN | Active | 040400 |
| Milwaukee River at Milwaukee | WI | Active | 040400 |
| Paw Paw River at Riverside | MI | Active | 040500 |
| St. Joseph River at Berrien Springs | MI | Inactive | 040500 |
| Kalamazoo River at New Richmond | MI | Inactive | 040500 |
| Grand River at Grand Haven | MI | Inactive | 040500 |
| White River nr Whitehall | MI | Active | 040601 |
| Pere Marquette River at Scottville | MI | Active | 040601 |
| Muskegon River nr Croton | MI | Active | 040601 |
| Manistte River nr Manistee | MI | Inactive | 040601 |
| Manistique River ab Manistique | MI | Inactive | 040601 |
| Lake Huron | |||
| Indian River at Indian River | MI | Inactive | 040700 |
| Cheboygan River nr Cheboygan | MI | Inactive | 040700 |
| Thunder Bay River nr Alpena | MI | Inactive | 040700 |
| Au Sable River nr Au Sable | MI | Active | 040700 |
| Rifle River nr Sterling | MI | Active | 040801 |
| Saginaw River at Saginaw | MI | Active | 040802 |
| Detroit River and Lake St. Clair | |||
| River Rouge at River Rouge | MI | Stage | 040900 |
| Blackj River nr Jeddo | MI | Active | 040900 |
| Clinton river at Mt. Clemens | MI | Active | 040900 |
| Huron River at Ann Arbor | MI | Active | 040900 |
| Lake Erie | |||
| River Raisin nr Monroe | MI | Active | 041000 |
| Maumee River at Waterville | OH | Active | 041000 |
| Portage R. near Elmore | OH | Active | 041000 |
| Sandusky River near Fremont OH | OH | Active | 041000 |
| Vermilion River near Vermilion OH | OH | Active | 041000 |
| Huron River at Milan OH | OH | Active | 041000 |
| Rocky River near Berea OH | OH | Active | 041100 |
| Black River at Elyria OH | OH | Active | 041100 |
| Cuyahoga River near Newburgh Heights | OH | Active | 041100 |
| Grand River near Painesville | OH | Active | 041100 |
| Cattaraugus Creek at Gowanda | NY | Active | 041201 |
| Tonawanda Creek at Rapids | NY | Active | 041201 |
| Genesee River at Rochester | NY | Active | 041300 |
| Oswego River at Lock 7 at Oswego | NY | Active | 041402 |
| Lake Ontario and St. Lawrence River | |||
| Black River at Watertown | NY | Active | 041501 |
| Oswegatchie River nr Heuvelton | NY | Active | 041503 |
| Grass River at Chase Mills | NY | Stage | 041503 |
| Raquette River at Raymondville | NY | Active | 041503 |
| St. Regis River at Brasher Center | NY | Active | 041503 |