https://nas.er.usgs.gov/AlertSystem/The US Geological Survey’s Nonindigenous Aquatic Species (NAS) Alert system is based on the NAS database (https://nas.er.usgs.gov), a database of locations of introduced aquatic species nationwide. An alert is generated when a species is found in a new state, county, or drainage where it has not previously been recorded. Users can view an archive of past alerts, or register to receive alerts either by e-mail or RSS, at https://nas.er.usgs.gov/AlertSystemen-us60http://vbasic.net/media/logo.gifFri, 03 Jul 2026 10:25:50 GMThttp://nas.er.usgs.gov/queries/specimenviewer.aspx?SpecimenID=1932904Wednesday, 01 July 2026 00:00:00*Bonus* USGS Nonindigenous Aquatic Species Alert - 07/01/26 - Golden Mussel (Limnoperna fortunei) was found in the Coyote Subbasin, Santa Clara County, California. This is the first occurrence for this species in the state.http://nas.er.usgs.gov/queries/specimenviewer.aspx?SpecimenID=1932909Wednesday, 01 July 2026 00:00:00USGS Nonindigenous Aquatic Species Alert - 07/01/26 - giantreed (Arundo donax) was found in the Lower White Subbasin, Arkansas County, Arkansas. This is the first occurrence for this species in the subbasin and the county.http://nas.er.usgs.gov/queries/specimenviewer.aspx?SpecimenID=1932910Wednesday, 01 July 2026 00:00:00*Bonus* USGS Nonindigenous Aquatic Species Alert - 07/01/26 - Golden Mussel (Limnoperna fortunei) was found in the Lower Sacramento Subbasin, Yolo County, California. This is the first occurrence for this species in the state.http://nas.er.usgs.gov/queries/specimenviewer.aspx?SpecimenID=1932903Wednesday, 01 July 2026 00:00:00USGS Nonindigenous Aquatic Species Alert - 07/01/26 - Golden Mussel (Limnoperna fortunei) was found in the Coyote Subbasin, Santa Clara County, California. This is the first occurrence for this species in the subbasin and the county.http://nas.er.usgs.gov/queries/specimenviewer.aspx?SpecimenID=1932912Wednesday, 01 July 2026 00:00:00USGS Nonindigenous Aquatic Species Alert - 07/01/26 - whorled hydrilla (Hydrilla verticillata) was found in the Upper Oconee Subbasin, Greene County, Georgia. This is the first occurrence for this species in the county.http://nas.er.usgs.gov/queries/specimenviewer.aspx?SpecimenID=1932905Wednesday, 01 July 2026 00:00:00USGS Nonindigenous Aquatic Species Alert - 07/01/26 - Golden Mussel (Limnoperna fortunei) was found in the Lower Sacramento Subbasin, Yolo County, California. This is the first occurrence for this species in the county.http://nas.er.usgs.gov/queries/specimenviewer.aspx?SpecimenID=1932911Wednesday, 01 July 2026 00:00:00*Bonus* USGS Nonindigenous Aquatic Species Alert - 07/01/26 - Golden Mussel (Limnoperna fortunei) was found in the Lower Sacramento Subbasin, Yolo County, California. This is the first occurrence for this species in the state.http://nas.er.usgs.gov/queries/specimenviewer.aspx?SpecimenID=1932885Thursday, 25 June 2026 00:00:00USGS Nonindigenous Aquatic Species Alert - 06/25/26 - zebra mussel (Dreissena polymorpha) was found in the Lake Meredith Subbasin, Moore County, Texas. This is the first occurrence for this species in the subbasin and the county.http://nas.er.usgs.gov/queries/specimenviewer.aspx?SpecimenID=1932886Thursday, 25 June 2026 00:00:00USGS Nonindigenous Aquatic Species Alert - 06/25/26 - quagga mussel (Dreissena rostriformis) was found in the Upper Crooked Subbasin, Crook County, Oregon. This is the first occurrence for this species in the state.http://nas.er.usgs.gov/queries/specimenviewer.aspx?SpecimenID=1932887Thursday, 25 June 2026 00:00:00USGS Nonindigenous Aquatic Species Alert - 06/25/26 - European frogbit (Hydrocharis morsus-ranae) was found in the St. Joseph Subbasin, Steuben County, Indiana. This is the first occurrence for this species in the state.