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Images
A map showing the locations of decision units surrounding the Canyon Mine, Arizona. The scientists used a incremental sampling methodology to collect samples from the predefined decision units. The points (squares and circles) indicate locations where surface soil subsamples were collected during June 2013.
A map showing the locations of decision units surrounding the Canyon Mine, Arizona. The scientists used a incremental sampling methodology to collect samples from the predefined decision units. The points (squares and circles) indicate locations where surface soil subsamples were collected during June 2013.
U.S. Geological Survey scientists analyzing samples for viral pathogens at the Laboratory for Infectious Disease and the Environment.
U.S. Geological Survey scientists analyzing samples for viral pathogens at the Laboratory for Infectious Disease and the Environment.
A comparison of streamflow and specific conductance (a measure of salinity) in Muddy Creek, Wyoming, for individual years from 2005 to 2012. Salt content decreases as streamflow increases, a common pattern in semiarid watersheds.
A comparison of streamflow and specific conductance (a measure of salinity) in Muddy Creek, Wyoming, for individual years from 2005 to 2012. Salt content decreases as streamflow increases, a common pattern in semiarid watersheds.
Experimental laboratory setup to study uranium in aquatic organisms. Bottles contain artificial freshwater amended with dissolved organic matter and a range of uranium concentrations.
Experimental laboratory setup to study uranium in aquatic organisms. Bottles contain artificial freshwater amended with dissolved organic matter and a range of uranium concentrations.
The New Croton Dam is part of New York City's water supply system, Croton-on-Hudson, Westchester County, New York.
The New Croton Dam is part of New York City's water supply system, Croton-on-Hudson, Westchester County, New York.
Idealized diagram of a public water supply's water distribution system.
Idealized diagram of a public water supply's water distribution system.
A PhD fellow from the University of York measuring pharmaceutical concentrations in samples collected from the Rivers Foss and Ouse, United Kingdom, during her work at the U.S. Geological Survey (USGS) National Water Quality Laboratory.
A PhD fellow from the University of York measuring pharmaceutical concentrations in samples collected from the Rivers Foss and Ouse, United Kingdom, during her work at the U.S. Geological Survey (USGS) National Water Quality Laboratory.
U.S. Geological Survey (USGS) scientists processing leachate samples collected for a national-scale study on the occurrence of contaminants of emerging concern (CECs) in landfill leachate disposed offsite.
U.S. Geological Survey (USGS) scientists processing leachate samples collected for a national-scale study on the occurrence of contaminants of emerging concern (CECs) in landfill leachate disposed offsite.
Experimental laboratory setup to study uranium in aquatic organisms. Bottles contain artificial freshwater amended with dissolved organic matter and a range of uranium concentrations.
Experimental laboratory setup to study uranium in aquatic organisms. Bottles contain artificial freshwater amended with dissolved organic matter and a range of uranium concentrations.
USGS scientist collecting a water sample from the stream prior to the swine manure spill.
USGS scientist collecting a water sample from the stream prior to the swine manure spill.
A view of the field exposure setup where the scientists exposed both larval and adult fathead minnows to treated effluent from a wastewater treatment plant.
A view of the field exposure setup where the scientists exposed both larval and adult fathead minnows to treated effluent from a wastewater treatment plant.
Smallmouth bass skin with melanistic lesions.
Smallmouth bass skin with melanistic lesions.
Organic Chemistry Research Laboratory — Sacramento, California. Vial containing an egg sample
Organic Chemistry Research Laboratory — Sacramento, California. Vial containing an egg sample
Two aerial images that demonstrate satellite-derived cyanobacteria concentrations in surface waters from an area in Florida.
Two aerial images that demonstrate satellite-derived cyanobacteria concentrations in surface waters from an area in Florida.
Field sampling in the Hells Canyon Reservoir Complex, with Dr. M. Marvin-DiPasquale at the bow of the sediment collection boat. Photographer: D. Krabbenhoft.
Field sampling in the Hells Canyon Reservoir Complex, with Dr. M. Marvin-DiPasquale at the bow of the sediment collection boat. Photographer: D. Krabbenhoft.
Transmission electron micrographs of complete hepatitis B viral particles
Transmission electron micrographs of complete hepatitis B viral particles
U.S. Geological Survey (USGS) scientists retrieve and process an ecological processing monitoring station. Each station includes a caged native mussel (shown attached to the buoy rope) and a sampler for measuring invertebrate consumers (not shown).
U.S. Geological Survey (USGS) scientists retrieve and process an ecological processing monitoring station. Each station includes a caged native mussel (shown attached to the buoy rope) and a sampler for measuring invertebrate consumers (not shown).
Maps showing the use of the new water-quality tracking tool to track water-quality conditions at 106 river and stream sites throughout the Nation.
Maps showing the use of the new water-quality tracking tool to track water-quality conditions at 106 river and stream sites throughout the Nation.
Scientist deploying a silicone passive sampler near a corn field in Cerro Gordo County, Iowa. The science team used the passive samplers to quantify pesticide exposure in wetland, grassland, and agricultural habitats.
Scientist deploying a silicone passive sampler near a corn field in Cerro Gordo County, Iowa. The science team used the passive samplers to quantify pesticide exposure in wetland, grassland, and agricultural habitats.
A diagram of the life stages of Pacific lamprey. Adults spawn in freshwater streams, then the larvae live in sediments. Juveniles then migrate to the ocean. After a life in the ocean they return to streams to spawn and die.
A diagram of the life stages of Pacific lamprey. Adults spawn in freshwater streams, then the larvae live in sediments. Juveniles then migrate to the ocean. After a life in the ocean they return to streams to spawn and die.
U.S. Geological Survey (USGS) scientist collecting groundwater samples for analysis of poly- and perfluoroalkyl substances (PFASs) from a multiport monitoring well downgradient from a former fire-training area on western Cape Cod, Massachusetts.
U.S. Geological Survey (USGS) scientist collecting groundwater samples for analysis of poly- and perfluoroalkyl substances (PFASs) from a multiport monitoring well downgradient from a former fire-training area on western Cape Cod, Massachusetts.