Toxic Substances Hydrology


One-stop collection of videos, photography, and audio. All items in this gallery are considered public domain unless otherwise noted.

Filter Total Items: 364
U.S. Geological Survey scientist holding a Colorado pikeminnow
March 18, 2021

Sampling Trip on the Green River

U.S. Geological Survey scientists holding a Colorado pikeminnow during a sampling trip in the Upper Colorado River Basin.

Female scientist working in laboratory
February 2, 2021

Graduate student performing mercury uptake studies in plankton

Graduate student, Grace Armstrong, performing mercury uptake studies in plankton at Mercury Research Laboratory, Middleton, Wisconsin.

Transition between melanistic (left side) and normal areas of skin (right side).
January 22, 2021

Melanistic and normal areas of fish skin

Microscopic appearance of normal and melanistic skin in fish from Chesapeake Bay watershed.

Rural setting in North Dakota
October 5, 2020

White barn in a rural setting

White barn in a rural setting in North Dakota.

water, table, hydrologic technician, ducks, trees
September 17, 2020

USGS Hydrologic Technician Collecting Water Samples

USGS Hydrologic Technician assisting with collection of downwelling porewater samples in a PFAS-impacted lake on Cape Cod.

Satellite data derived cyanobacteria biomass estimate
February 11, 2020

Aerial image and satellite derived image of Florida Lakes

This image is a cropped rendition of  two aerial images that demonstrate satellite-derived cyanobacteria concentrations in surface waters from an area in Florida. The top image is true-color photograph, and the bottom image is from the Medium Resolution

constructed wetland montage
December 31, 2019

A seasonal wetland engineered to have a deeper and shallow pool

A three year study was conducted in seasonal wetlands to determine if a deep and shallow water pool resulted in a reduction of methylmercury in caged fish and surface water.