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Voyageurs National Park (VNP), a pristine setting with abundant lakes, wetlands, and streams situated on granitic bedrock, is located near northern Minnesota's border with Canada. Long-term studies at VNP have revealed trends in mercury concentration in precipitation, surface water, and fish.
Voyageurs National Park (VNP), a pristine setting with abundant lakes, wetlands, and streams situated on granitic bedrock, is located near northern Minnesota's border with Canada. Long-term studies at VNP have revealed trends in mercury concentration in precipitation, surface water, and fish.
Algal and Other Environmental Toxins Laboratory — Lawrence, Kansas. Cyanobacterial accumulation along with a dead fish
Algal and Other Environmental Toxins Laboratory — Lawrence, Kansas. Cyanobacterial accumulation along with a dead fish
Tree swallow nestlings (Tachycineta bicolor) in a nesting box
Tree swallow nestlings (Tachycineta bicolor) in a nesting box
Typical San Francisco Bay wetland habitat dominated by pickleweed (Salicornia pacifica).
Typical San Francisco Bay wetland habitat dominated by pickleweed (Salicornia pacifica).
The Silver Ledge Mine in the area of upper Mineral Creek, near Silverton, Colorado, is one of many abandoned mine sites in the watershed.
The Silver Ledge Mine in the area of upper Mineral Creek, near Silverton, Colorado, is one of many abandoned mine sites in the watershed.
Biosolids from a wastewater treatment plant were loaded onto trucks for transport to the field. A team of USGS scientists and their colleagues collected samples of biosolids for analysis from freshly exposed surfaces created by the machinery used to load the biosolids onto trucks.
Biosolids from a wastewater treatment plant were loaded onto trucks for transport to the field. A team of USGS scientists and their colleagues collected samples of biosolids for analysis from freshly exposed surfaces created by the machinery used to load the biosolids onto trucks.
USGS scientists extracted DNA from aquifer materials and analyzed the DNA for microbial community composition using several methods.
USGS scientists extracted DNA from aquifer materials and analyzed the DNA for microbial community composition using several methods.
Grey Tree Frog
John Clune and Connie Loper, PA Water Science Center, processing an emerging-contaminants bed-sediment sample at Rock Creek near Gettysburg, PA.
John Clune and Connie Loper, PA Water Science Center, processing an emerging-contaminants bed-sediment sample at Rock Creek near Gettysburg, PA.
John Clune, PA Water Science Center, processing an emerging-contaminants bed-sediment sample at Lititz Run.
John Clune, PA Water Science Center, processing an emerging-contaminants bed-sediment sample at Lititz Run.
John Clune, PA Water Science Center, collecting an emerging-contaminants bed-sediment sample at the Susquehanna River at Danville,PA.
John Clune, PA Water Science Center, collecting an emerging-contaminants bed-sediment sample at the Susquehanna River at Danville,PA.
Cement Creek following storm event in July, 2004. Note the orange discoloration of the stream derived from weathering of bedrocks and from mined areas. This type of event happens frequently in the Animas Watershed near Silverton, Colorado. View is to the south, with Kendall Mountain in the distance.
Cement Creek following storm event in July, 2004. Note the orange discoloration of the stream derived from weathering of bedrocks and from mined areas. This type of event happens frequently in the Animas Watershed near Silverton, Colorado. View is to the south, with Kendall Mountain in the distance.
Photo of Foster's Tern (Sterna forsteri) while hunting. Forster’s terns are among the most at-risk wildlife species to mercury toxicity in western North America.
Photo of Foster's Tern (Sterna forsteri) while hunting. Forster’s terns are among the most at-risk wildlife species to mercury toxicity in western North America.
Hilltop view of the Ravenswood ponds (right side of levee) in South San Francisco Bay. These former salt-production ponds were subsequently slated for a major wetland restoration project.
Hilltop view of the Ravenswood ponds (right side of levee) in South San Francisco Bay. These former salt-production ponds were subsequently slated for a major wetland restoration project.
Municipal biosolids being loaded onto spreader for land application
Municipal biosolids being loaded onto spreader for land application
Potential pathways for veterinary medicines in soil and water
Potential pathways for veterinary medicines in soil and water
USGS researchers Jennifer Agee and Le Kieu sampling surface sediment in a vegetated Louisiana saltmarsh. Photographer: M. Marvin-DiPasquale.
USGS researchers Jennifer Agee and Le Kieu sampling surface sediment in a vegetated Louisiana saltmarsh. Photographer: M. Marvin-DiPasquale.
Map showing the location of the total chlorinated ethene plume and monitoring wells at Submarine Base Kings Bay, Georgia. The map showes the location of the plume prior to a series of in situ oxidation source-removal actions. Figure 17 from USGS WRIR 03-4057.
Map showing the location of the total chlorinated ethene plume and monitoring wells at Submarine Base Kings Bay, Georgia. The map showes the location of the plume prior to a series of in situ oxidation source-removal actions. Figure 17 from USGS WRIR 03-4057.
USGS scientists collecting water-quality samples for the analysis of wastewater related contaminants, Boulder Creek, Colorado.
USGS scientists collecting water-quality samples for the analysis of wastewater related contaminants, Boulder Creek, Colorado.
Oligotrophic waters of the Buffalo National River taken in the fall, Photo Credit: Lucas Driver
Oligotrophic waters of the Buffalo National River taken in the fall, Photo Credit: Lucas Driver
This photo shows a road salt storage stockpile that is awaiting use for pavement deicing, Port of Milwaukee, WI. The use of salt to deice pavement can be harmful to aquatic life in urban streams. The USGS is involved in studies that focus on the influence of winter runoff on aquatic ecosystems.
This photo shows a road salt storage stockpile that is awaiting use for pavement deicing, Port of Milwaukee, WI. The use of salt to deice pavement can be harmful to aquatic life in urban streams. The USGS is involved in studies that focus on the influence of winter runoff on aquatic ecosystems.