Images

USGS scientists Gregory D'Agostino and Katherine Wares collecting soil and worms at a site on Cape Cod, Massachusetts, that was contaminated by PFAS from fire-fighting foam.  

Invertebrate being collected at a site on Cape Cod, Massachusetts, that was contaminated by PFAS from fire-fighting foam used at the site. 

Scientist istalling a swallow nest box near Ashumet Pond, Cape Cod Massachusetts as part of a study on the fate and effects of PFAS chemicals. 

Joe Adams (USGS National Uncrewed Systems Office) pilots and Keith Grabner (USGS Columbia Environmental Research Center) acts as visual observer as a drone equipped with EPA particulate and gas samplers (right) hovers in the plume of a spring prescribed burn at the Konza Prairie Biological Station, Tallgrass Prairie National Preserve, Kansas.

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

USGS scientists Jason Sorenson and Andrea Tokranov (out of the image) collecting lake-bottom sediments from Ashumet Pond on Cape Cod, Massachusetts for use in laboratory experiments on the fate of PFAS at groundwater/surface-water boundaries.  The sediments are collected by pushing a tube into the lake bottom and transferring the sediment and pore water in

MC-ICP-MS used for mercury stable isotope analyses.

Nippon mercury analyzer for sediments and fish.

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

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

White barn in a rural setting in North Dakota.

A well pump in rural North Dakota.

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

Visitors at Winnewissa Falls in Pipestone National Monument

Benthic macroinvertebrate taxa collected from Straight Run, Tioga County, Pennsyvania, USA. 

This image is a cropped rendition of  two aerial images that demonstrate satellite-derived cyanobacteria concentrations in surface waters from an area in Florida.

Graphical depiction of a seasonal wetland engineered to have a deeper pool and more open water on the downstream side of the wetland. This management strategy was tested during a 3-year period to determine if it resulted in a reduction of methylmercury in caged fish and surface water.

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.

Sediment core sample taken at Grubers Grove Bay on the Wisconsin River, Wisconsin.

(A). Algal bloom magnitude in Florida lakes in 2011 before normalization and (B) after normalization by lake surface area. Area-normalized magnitude (km⁻²) of selected lakes provided as part of bar labels in parenthesis.

Map of the study region showing the location of lakes in (A) Florida and (B) Ohio. In total, 135 lakes in Florida and 21 lakes in Ohio, were resolvable with the full resolution MERIS data and are used in this study. Land and lakes are shown in gray and blue colors respectively.