USGS scientist measuring dissolved oxygen
By Environmental Health Program
2008 (approx.)
![USGS scientist determining if enough dissolved oxygen is present for biodegradation of hormones in Fourmile Creek, Iowa.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/DO_MeasurmentFourmileCreek_l.jpg?itok=e2sbU8Ft)
Detailed Description
USGS scientist determining if enough dissolved oxygen is present for biodegradation of hormones in Fourmile Creek, Iowa.
Sources/Usage
Public Domain.