Scientist measuring water quality at Clough Island in the St. Louis River Estuary
By Upper Midwest Water Science Center
June 2026 (approx.)
Detailed Description
Olive Stern of Rensselaer Polytechnic Institute takes a measurement of pH, specific conductance, dissolved oxygen, and turbidity at Clough Island in the St. Louis River Estuary near Lake Superior.
Sources/Usage
Public Domain.