| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 243764 | OH | Ottawa | Ottawa County | 2008 | 04100010 | Cedar-Portage | collected |
| 1467363 | OH | Sandusky | Aldrich Pond | 2010 | 04100010 | Cedar-Portage | established |
| 1599545 | OH | Ottawa | [No locality description provided] | 2012 | 04100010 | Cedar-Portage | established |
| 1599546 | OH | Ottawa | [No locality description provided] | 2012 | 04100010 | Cedar-Portage | established |
| 1560801 | OH | Ottawa | [No locality description provided] | 2014 | 04100010 | Cedar-Portage | established |
| 1599530 | OH | Ottawa | [No locality description provided] | 2012 | 04100010 | Cedar-Portage | established |
| 1599531 | OH | Ottawa | [No locality description provided] | 2012 | 04100010 | Cedar-Portage | established |
| 1599544 | OH | Ottawa | [No locality description provided] | 2012 | 04100010 | Cedar-Portage | established |
| 1599543 | OH | Ottawa | [No locality description provided] | 2012 | 04100010 | Cedar-Portage | established |
| 1560795 | OH | Ottawa | [No locality description provided] | 2014 | 04100010 | Cedar-Portage | established |
| 1560800 | OH | Ottawa | [No locality description provided] | 2014 | 04100010 | Cedar-Portage | established |
| 1655330 | OH | Ottawa | Middle Harbor | 1948 | 04100010 | Cedar-Portage | unknown |
| 1748924 | OH | Ottawa | [No locality description provided] | 2022 | 04100010 | Cedar-Portage | |
| 1748983 | OH | Ottawa | [No locality description provided] | 2022 | 04100010 | Cedar-Portage | |
Citation for this information:
U.S. Geological Survey, 2026,
Myriophyllum spicatum: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 2/20/2026