.
| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 887779 | WI | Ozaukee | North wall at sewage plant, Port Washington, WI (LM7). Still present 2002 (LM7) | 1995 | 04030101 | Manitowoc-Sheboygan | established |
| 887781 | WI | Manitowoc | North side of seawall, Two Rivers, WI (LM9) | 1995 | 04030101 | Manitowoc-Sheboygan | unknown |
| 887799 | WI | Sheboygan | Harbor Center, Sheboygan, WI (LM8) | 2002 | 04030101 | Manitowoc-Sheboygan | unknown |
| 887800 | WI | Door | Pier off Hwy 57, Bailey's Harbor, WI (LM11) | 2002 | 04030102 | Door-Kewaunee | unknown |
| 887780 | WI | Racine | North beach, Racine, WI (LM5) Still present 2002. (LM5) | 1995 | 04190000 | Lake Michigan | established |
Citation for this information:
U.S. Geological Survey, 2026,
Bangia atropurpurea: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 6/4/2026