Zebra mussels were most likely brought to the Great Lakes in the ballast tanks of ships. They were first discovered in Lake St. Clair in 1988, and found in Lake Erie in the late 1980's. In 1991, quagga mussels were found in Lake Erie. Since then, zebra mussels have spread and become established in several inland lakes and rivers throughout Pennsylvania. View the maps below to get up to date information on the current distribution of invasive mussels in PA.
JPEG Maps (not interactive)
- As of 2012- Zebra and quagga mussels (presence and absence)
Interactive ArcGIS maps
This map can be viewed in any web browser and provides an interactive view of all network reports. Layers can be turned on and off to show presence or absence of zebra and quagga mussels in locations around Pennsylvania. Clicking on the colored pins will pop up a window to give specific information about each of the sites.
National maps:
- USGS zebra mussel distribution map
- USGS quagga mussel distribution map
- Progression of the Zebra mussel range map
- Dynamic Map of Zebra Mussel Distribution
- GLIN Map Builder - The GLIN map builder lets you interactively explore the distribution of invasive species throughout the United States and Pennsylvania by creating your own map.
Our Financial Supporters:
Home | News & Events | Monitoring | Distribution Maps | Resources | Contact Us
NETWORK PARTNERS:
Pennsylvania Department of Environmental Protection
Pennsylvania Coastal Zone Management Program
Pennsylvania Fish and Boat Commission
Philadelphia Water Department
Western Pennsylvania Conservancy
Normandeau Associates, Inc.
U.S. Army Corps of Engineers
Erie County Department of Health
Exelon Corporation