NAS - Nonindigenous Aquatic Species
Quagga Mussel Sightings Distribution
This map layer is a compilation of confirmed
quagga mussel sighting reports in the United States and Canada from 1988 through 2011 and is updated daily.
It provides geographical and historical information to show distribution
over space and time. The reports came from a variety of Federal, State, and
municipal agencies, universities, public utilities, engineering and
private consultant firms. These data are intended for geographic display and analysis at the
national level, and for large regional areas. Sightings were reported with varying levels of accuracy.
Some of the reports were as latitude-longitude coordinates, some as
river miles, and others as just a lake, beach, harbor, or a
water body and nearest town name. If no specific location was reported in a lake, the point was
assigned to the center. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data. It is possible that quagga mussels can be found at other locations not displayed here, but have gone unreported to this effort.
No responsibility is assumed by the U.S. Geological Survey in the use of these data. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived
from these data.
Quagga mussels are represented with the larger red markers. Click on a marker
for more information. For zebra mussel distribution, click
here. To REPORT an observation or collection of mussels, click here.
Suggested citation: Benson, A. J. 2014. Quagga mussel sightings distribution. Retrieved 11/23/2014 from http://nas.er.usgs.gov/taxgroup/mollusks/zebramussel/quaggamusseldistribution.aspx
For more information, contact: Amy Benson, firstname.lastname@example.org
References to non-U.S. Department of the Interior (DOI) products do not constitute an endorsement by the DOI.
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