Zebra mussels probably came 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 in northwestern Pennsylvania including Edinboro and Sandy lakes; the Conneauttee, Conewango, and French creeks; and the upper Allegheny River. Zebra mussels have also been found in the lower Allegheny, Monongahela and upper Ohio Rivers, and in a diving a quarry in Bethlehem. In addition, quagga mussels have been found in Clover Creek quarry (also known as Blue Hole quarry) near Williamsburg. In 2007, zebra mussels were discovered near Lawrenceville in Cowanesque Lake, a tributary to the Susquehanna River.
Pennsylvania maps:
2007 Pennsylvania Zebra and Quagga Mussel Reports in an interactive Google Earth map that contains all the Network Monitor's report along with high-resolution aerial and satellite imagery, terrain, road and street labels, and more. (Note: You must have the free Google Earth installed to view this file.)
If you have the Google Earth installed, double click the link above to explore zebra and quagga mussel sightings in Pennsylvania.
- Double click on the red and yellow pins to view information for each site.
If you do not have Google Earth installed, view the images below instead
(no interactivity available)
JPG Maps
- As of 2008- Quagga Mussels (jpg image only)
- As of 2008 - Zebra Mussels (jpg image only)
- As of 2008 - Zebra and Quagga Mussels (jpg image only)
ArcView Maps (Users must have ArcView software to view these files)
- July 2008 - download Zipped ArcView Files
National maps:
- The U.S. Geological Survey (USGS) zebra mussel/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.
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