| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 246518 | WI | Manitowoc | Manitowoc County | 2008 | 04030101 | Manitowoc-Sheboygan | collected |
| 261716 | WI | Manitowoc | Cooperstown (5 mi. south of) beside Rt. 43, 7.4 mi north of Rt. 10 | 1991 | 04030101 | Manitowoc-Sheboygan | established |
| 261723 | WI | Kewaunee | South of Kewaunee Nuclear Power Plant, on east side of Rt. 42, north of County Rd BB. | 1993 | 04030101 | Manitowoc-Sheboygan | established |
| 261727 | WI | Iron | Saxon, west end of village | 1996 | 04010302 | Bad-Montreal | established |
| 894999 | WI | Ashland | Ditch west of WI-13, just north of Philaja Rd | 2009 | 04010302 | Bad-Montreal | established |
| 261715 | WI | Racine | Sturtevant, 1 mile east of I-94 in median of Washington Ave. | 2008 | 04040002 | Pike-Root | established |
| 261718 | WI | Winnebago | Oshkosh, beneath US 41 overpass at WI-21 | 1974 | 04030201 | Upper Fox | established |
| 261726 | WI | Outagamie | Appleton, between westbound College Ave (Rt. 125) and its frontage Rd at 2120 College Ave | 1989 | 04030204 | Lower Fox | established |
| 261728 | WI | Brown | Green Bay, at Lombardi Ave and Military Rd | 1997 | 04030204 | Lower Fox | established |
Citation for this information:
U.S. Geological Survey, 2025,
Juncus compressus: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 12/18/2025