Recording water-quality field parameters
![Recording water-quality field parameters on the Merrimack River, Massachusetts](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/20200930_181757_web.jpg?itok=7cW-2Akt)
Detailed Description
USGS hydrologist and a grad student from University of Massachusetts Lowell recording water-quality field parameters on the Merrimack River, Massachusetts.
Sources/Usage
Public Domain.