| Specimen ID | 116423 |
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| Group | Mollusks-Bivalves |
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| Genus | Dreissena |
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| Species | polymorpha |
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| Common Name | zebra mussel |
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| State | IL |
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| County | Cook |
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| Locality | Chicago River, north shore channel, upstream from effluent discharge of Northside Water Reclamation Plant (3 mile from Lake Michigan, about River Mile 327) |
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| HUC8 Name | Chicago |
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| HUC8 Number | 7120003 |
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| Latitude | 41.9019584656 |
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| Longitude | -87.6475296021 |
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| Lat-Long Source | Map derived |
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| Lat-Long Accuracy | accurate |
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| Map | |
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| Day | 4 |
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| Month | 10 (October) |
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| Year | 1991 |
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| Year Accuracy (Specimen) | Actual |
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| Contact | [not displayed for privacy reasons] |
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| Primary Pathway | shipping |
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| Status | established |
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| Record Type | Personal communication |
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| Fresh/Marine Introduction | Freshwater |
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| Number Collected/Observed | 50 |
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| Specimen Size | 2 - 4 mm |
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