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United States occurrence of microcystins in lakes in the contiguous 48 U.S. states categorized by World Health Organization relative probable health risk. WHO low, moderate, and high refer to the relative human recreational health thresholds for microcystin exposure. Map not shown to scale.
United States occurrence of microcystins in lakes in the contiguous 48 U.S. states categorized by World Health Organization relative probable health risk. WHO low, moderate, and high refer to the relative human recreational health thresholds for microcystin exposure. Map not shown to scale.
Filtration system used for processing samples using a technique called polymerase chain reaction (PCR) or quantitative PCR (qPCR).
Filtration system used for processing samples using a technique called polymerase chain reaction (PCR) or quantitative PCR (qPCR).
U.S. Geological Survey (USGS) scientist preparing samples for analysis of protein levels to normalize results from oxidative stress bioassays.
U.S. Geological Survey (USGS) scientist preparing samples for analysis of protein levels to normalize results from oxidative stress bioassays.
The Snake River is the largest tributary of the Columbia River. It drains over 108,000 square miles in mainly Idaho and portions of Montana, Nevada, Oregon, Washington, and Wyoming. The climate of much of the Snake River watershed is arid or semi-arid and spring snowmelt contributes substantially to the river’s flow.
The Snake River is the largest tributary of the Columbia River. It drains over 108,000 square miles in mainly Idaho and portions of Montana, Nevada, Oregon, Washington, and Wyoming. The climate of much of the Snake River watershed is arid or semi-arid and spring snowmelt contributes substantially to the river’s flow.
Scientists optimized existing methods to collect and identify microorganisms including Bacillus anthracis, a pathogenic microorganism, in 4,800 soil samples across the United States, and developed a
Scientists optimized existing methods to collect and identify microorganisms including Bacillus anthracis, a pathogenic microorganism, in 4,800 soil samples across the United States, and developed a
Photomicroscopy and Flow Cytometry Laboratory — Lafayette, Louisiana. Microscopic video imaging is used for computerized analysis of sperm motility parameters
Photomicroscopy and Flow Cytometry Laboratory — Lafayette, Louisiana. Microscopic video imaging is used for computerized analysis of sperm motility parameters
Michigan Bacteriological Research Laboratory — Lansing, Michigan. A microbiologist preparing a water sample
Michigan Bacteriological Research Laboratory — Lansing, Michigan. A microbiologist preparing a water sample
Dr. Bethany K. Kunz sets up a mobile-mounted dust meter, which measures concentrations of particulate matter across a range of particle sizes. She and her team use the meter to determine the effectiveness of dust control treatments on roads and estimate human exposure to dust in the inhalable size range.
Dr. Bethany K. Kunz sets up a mobile-mounted dust meter, which measures concentrations of particulate matter across a range of particle sizes. She and her team use the meter to determine the effectiveness of dust control treatments on roads and estimate human exposure to dust in the inhalable size range.
Four USGS scientists sampling pore water from a canoe in un-named lake approximately 340 meters downgradient of the Bemidji, Minnesota crude oil spill site.
Four USGS scientists sampling pore water from a canoe in un-named lake approximately 340 meters downgradient of the Bemidji, Minnesota crude oil spill site.
Inside a debris cage, which is used to prevent pipe blockages, at one of 21 stormwater outfalls that was sampled prior to discharge to streams or stormwater ponds.
Inside a debris cage, which is used to prevent pipe blockages, at one of 21 stormwater outfalls that was sampled prior to discharge to streams or stormwater ponds.
A stormwater pond that receives runoff from a residential landscape. U.S. Geological Survey scientists analyzed samples of stormwater runoff collected during 2016 and 2017 at 21 sites for 438 organic chemicals and 62 inorganic elements.
A stormwater pond that receives runoff from a residential landscape. U.S. Geological Survey scientists analyzed samples of stormwater runoff collected during 2016 and 2017 at 21 sites for 438 organic chemicals and 62 inorganic elements.
USGS scientist collecting water quality parameters from Horn Creek, a small side drainage in Grand Canyon in Aprill, 2017
USGS scientist collecting water quality parameters from Horn Creek, a small side drainage in Grand Canyon in Aprill, 2017
Willow Spring in Hack Canyon in Arizona north of the Grand Canyon. A sign next to the spring says Water Not Suitable for Drinking. The spring has elevated levels of uranium and selenium. The elevated uranium level is most likely not associated with breccia-pipe uranium mining in the area.
Willow Spring in Hack Canyon in Arizona north of the Grand Canyon. A sign next to the spring says Water Not Suitable for Drinking. The spring has elevated levels of uranium and selenium. The elevated uranium level is most likely not associated with breccia-pipe uranium mining in the area.
Iowa River at Iowa City
Scientist preparing for granular activated carbon experiments
Scientist preparing for granular activated carbon experiments
A photograph of U.S. Geological Survey (USGS) custom automated pathogen sampler (top) and schematic illustrating the remote-unattended-automated pathogen sampler (bottom). Sample collection proceeds over the course of a runoff-event or low-flow period for up to a maximum of 5 days before a site visit by personnel is needed to collect the samples.
A photograph of U.S. Geological Survey (USGS) custom automated pathogen sampler (top) and schematic illustrating the remote-unattended-automated pathogen sampler (bottom). Sample collection proceeds over the course of a runoff-event or low-flow period for up to a maximum of 5 days before a site visit by personnel is needed to collect the samples.
New Orleans, La., July 29, 2008 -- Buras has become famous as the location where, on August 29, 2005, at 6:10 AM CDT, the eye of Hurricane Katrina, made its strongest landfall. The town's freshing painted water tower stands as a symbol of recovery for the state and the community. Jacinta Quesada/FEMA
New Orleans, La., July 29, 2008 -- Buras has become famous as the location where, on August 29, 2005, at 6:10 AM CDT, the eye of Hurricane Katrina, made its strongest landfall. The town's freshing painted water tower stands as a symbol of recovery for the state and the community. Jacinta Quesada/FEMA
Wastewater from oil production in the Williston Basin leaked from a pipeline, spilling into Blacktail Creek, North Dakota. Geochemical and biological samples were to identify geochemical signatures of spilled wastewaters as well as biological responses.
Wastewater from oil production in the Williston Basin leaked from a pipeline, spilling into Blacktail Creek, North Dakota. Geochemical and biological samples were to identify geochemical signatures of spilled wastewaters as well as biological responses.
Cumulative impacts of oil and gas production on watersheds in North Dakota between January 2008 and June 2015. Watershed volumes were calculated by combining reported values of oil, brine, and unidentified liquid waste accidentally released during drilling operations.
Cumulative impacts of oil and gas production on watersheds in North Dakota between January 2008 and June 2015. Watershed volumes were calculated by combining reported values of oil, brine, and unidentified liquid waste accidentally released during drilling operations.
Raised black external tumors on adult brown bullhead (Ameiurus nebulosus) collected from Lake Memphremagog (Vermont and Canadian Border) were identified as malignant melanoma in a 2014–17 study.
Raised black external tumors on adult brown bullhead (Ameiurus nebulosus) collected from Lake Memphremagog (Vermont and Canadian Border) were identified as malignant melanoma in a 2014–17 study.
Burning coal to provide energy contributes mercury to the atmosphere
Burning coal to provide energy contributes mercury to the atmosphere