Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1418764
| OR | Clackamas | Clackamas River at The Cove | 2017 |
17090011
| Clackamas | established |
1419120
| OR | Clackamas | Unnamed pond on private property | 2017 |
17090007
| Middle Willamette | established |
1419040
| OR | Clatsop | Yeon unit of Lewis and Clark National Historical Park | 2017 |
17100201
| Necanicum | unknown |
1418758
| OR | Marion | In Minto-Brown Island Park, just off the paved pedestrian trail, and then just off a small boardwalk that jets out into the pond/marsh here. | 2017 |
17090007
| Middle Willamette | established |
1418759
| OR | Marion | In Minto-Brown Island Park, just off the paved pedestrian trail, and then just off a small boardwalk that jets out into the pond/marsh here. | 2017 |
17090007
| Middle Willamette | established |
1419067
| OR | Multnomah | Jantzen Bay Marina | 2017 |
17080003
| Lower Columbia-Clatskanie | established |
1417520
| OR | Multnomah | Willamette river down stream of Portland OR | 2017 |
17090012
| Lower Willamette | established |
1419119
| OR | Polk | Willamette River-small backwater off west bank | 2017 |
17090007
| Middle Willamette | established |
1419068
| OR | Tillamook | Crescent creek between Lake Lytle and the small lagoon/lake to the north. | 2017 |
17100203
| Wilson-Trusk-Nestuccu | unknown |
1418819
| OR | Washington | The large pond on the OHSU West campus in Hillsboro/Beaverton | 2017 |
17090010
| Tualatin | established |