| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 1633032 | OH | Lucas | Growing along margins in canal way on the right hand side, near inflow. | 2019 | 04100010 | Cedar-Portage | established |
| 1633037 | OH | Lucas | Directly at informal kayak launch on margin. Spread throughout water body | 2019 | 04100010 | Cedar-Portage | established |
| 1633035 | OH | Lake | Throughout this lagoon along the margins near boat ramp for lagoon, marina area, near the bridge to enter the marina | 2019 | 04260000 | Lake Erie | established |
| 1633036 | OH | Fulton | Small inlet leading to an inflow river, on the left hand side of boat launch/dock | 2019 | 04100006 | Tiffin | established |
| 1633660 | OH | Wyandot | [Sites Lake] | 2019 | 04100011 | Sandusky | established |
| 1633668 | OH | Wyandot | [Sites Lake] | 2019 | 04100011 | Sandusky | established |
| 1633671 | OH | Lucas | [Lake Erie] | 2019 | 04100010 | Cedar-Portage | established |
| 1633678 | OH | Lucas | [No locality description provided] | 2019 | 04100010 | Cedar-Portage | established |
| 1633689 | OH | Ottawa | [No locality description provided] | 2019 | 04100010 | Cedar-Portage | established |
| 1633706 | OH | Ottawa | [No locality description provided] | 2019 | 04100011 | Sandusky | established |
| 1633716 | OH | Lucas | [No locality description provided] | 2019 | 04100010 | Cedar-Portage | established |
| 1633719 | OH | Ottawa | [No locality description provided] | 2019 | 04100010 | Cedar-Portage | established |
| 1633725 | OH | Ottawa | [No locality description provided] | 2019 | 04260000 | Lake Erie | established |
| 1633724 | OH | Ottawa | [Toussaint River] | 2019 | 04100010 | Cedar-Portage | established |
| 1633721 | OH | Ottawa | [Lake Erie] | 2019 | 04100010 | Cedar-Portage | established |
| 1633732 | OH | Ottawa | [No locality description provided] | 2019 | 04100010 | Cedar-Portage | established |
| 1633733 | OH | Ottawa | [No locality description provided] | 2019 | 04100011 | Sandusky | established |
| 1633738 | OH | Sandusky | [Lake Erie] | 2019 | 04100011 | Sandusky | established |
| 1678552 | OH | Fulton | [No locality description provided] | 2019 | 04100006 | Tiffin | |
Citation for this information:
U.S. Geological Survey, 2024,
Butomus umbellatus: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 4/25/2024