Images

Experimental setup for small-scale transport test designed to assess the effectiveness of the "colmation layer" at the bottom sediments of Ashumet Pond (Cape Cod, Massachusetts) for filtering out cyanobacteria and viruses.

U.S. Geological Survey (USGS) scientists collecting water-quality samples from shallow groundwater under Ashumet Pond, Cape Cod, Massachusetts.

Crude-oil recovery system implemented at the Bemidji, Minnesota, research site, 1999 to 2003. The crude-oil in the unsaturated zone above the water table contained a mixture of crude oil, air, and water in the sediment pore spaces (Delin and Herkelrath, 2014).

U.S. Geological Survey (USGS) scientist collects periphyton samples from Nantahala river near Hewitt, North Carolina

U.S. Geological Survey (USGS) scientist measuring dissolved oxygen in a stream water sample. The scientist is part of a USGS team of scientists that are investigating the potential environmental effects of activities at an oil and gas wastewater injection facility in West Virginia.

Scientist holding an adult Pacific lamprey collected at Bonneville Dam. The dam is on the Columbia River between the states of Oregon and Washington.

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A view of the New River from the New River Gorge Bridge, West Virgina. Wolf Creek is a tributary of the New River. Photo: Denise M. Akob, USGS.

A U.S. Geological Survey (USGS) scientist recording water-quality parameters (pH, temperature, and specific conductance) during the purging of a domestic well that was sampled for radon at a site north of Jersey Shore, Pennsylvania.

Installing nest boxes at Clarks Marsh, Michigan, for a study of avian exposure and effects of Perfluoroalkyl substances (PFASs). Clarks Marsh, is on the south side of the former Wurtsmith Air Force Base in Oscoda Township, Michigan.

Between 2009 and 2018, scientists conducted a national scale assessment of mercury accumulation in the National Park System using dragonfly larvae as biosentinels (species that accumulate a pollutant in their tissues as an index of exposure to other organisms without significant adverse effects to the biosentinel) through a citizen science network called the Dragonf

USGS scientist collecting water-quality samples from the Enoree River, SC

USGS scientist processing water-quality samples. She is surrounded by lots of equipment

U.S. Geological Survey (USGS) hydrologic technician Dan Polette collecting a water-quality sample from Zollner Creek, Oregon for a national-scale investigation of the environmental occurrence of neonicotinoid insecticides in agricultural and urban settings.

American kestrel egg experiment

A National Park Service researcher holds a brook trout in Mount Rainier National Park, Washington. Scientists have found low levels of mercury found in fish from National Parks in Western States.

USGS scientists collecting microcystin samples from the Enoree River at Pelham, South Carolina

USGS scientist collects water samples and measures stream-water field parameters at North Sylamore Creek, Arkansas, on January 7, 2014. About 60 sample bottles are filled and shipped to USGS and U.S. Environmental Protection Agency laboratories across the Nation for chemical and biological analysis.

A former uranium mill tailings site near Rifle, Colorado, is next to the Colorado River.

Tidepool scenes of vibrantly colored sea stars could become a rarity as the Sea Star Wasting Disease spreads.

USGS scientist records information at a sampling site on a stream in Pennsylvania. The stream was sampled immediately downstream of the point of discharge of treated wastewater.