On Thursday, August 22, 2019, a single cluster of Water hyacinth (Eichhornia crassipes) was found in the East River in the City of Green Bay. The yellow star on the above map displays the location where the plant was found.
The single cluster (that was removed) was the only plant observed, but additional monitoring of the river and the adjacent 
upland is planned for Thursday, September 5, 2019. Additional follow up will occur after the monitoring occurs. Given the timing of this discovery, the plant could have been purposefully released from a water garden. This area has also experienced multiple flooding events in 2019 so accidental release via a flooded water garden could also be a possibility. Either way, this species is illegal to possess so WDNR will also be following up with targeted outreach and investigate from where the plant may have come.
The Water hyacinth plant was found and submitted by Wisconsin Department of Natural Resources employee Andy Hudak (Regional Stream Biologist). It was verified by Wisconsin Department of Natural Resources employees Amanda Smith (Aquatic Invasive Species Specialist) and Alex Selle (Water Resources Management Specialist).
The information above is originally from the Wisconsin Department of Natural Resources (WDNR).
For more information on Water hyacinth and to read about findings near Winneconne in 2018, CLICK HERE!
Questions? Comments? Contact Chris Acy, the AIS Coordinator for the Winnebago Waterways Program covering Fond du Lac, Calumet, and Winnebago Counties at (920) 460-3674 or chris@fwwa.org!
