| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 1555787 | MI | Berrien | [No locality description provided] | 2013 | 04040001 | Little Calumet-Galien | established |
| 1599607 | MI | Berrien | [No locality description provided] | 2012 | 04040001 | Little Calumet-Galien | established |
| 1555788 | MI | Berrien | [No locality description provided] | 2013 | 04040001 | Little Calumet-Galien | established |
| 1599605 | MI | Berrien | [No locality description provided] | 2012 | 04040001 | Little Calumet-Galien | established |
| 1599608 | MI | Berrien | [No locality description provided] | 2012 | 04040001 | Little Calumet-Galien | established |
Citation for this information:
U.S. Geological Survey, 2026,
Potamogeton crispus: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 1/22/2026