Images

A scientist walking on a trail in Grand Canyon, National Park

View of Old Mans Creek near Iowa City, Iowa upstream from a bridge used for collecting water-quality samples (USGS Site ID: 05455100).

Long-wave ultraviolet (UV) and white-light illumination of lesions associated with white-nose syndrome.  Points of orange–yellow fluorescence (arrows) detected on a roosting Indiana myotis (Myotis sodalis) following surface illumination with a field-portable 9-watt 368-nm fluorescent UV light (photo by Tina Cheng with permission).

Western view toward the Red Mountains near Silverton, Colorado, taken just upstream from the North Fork Cement Creek drainage in 2006. The photo illustrates acidic drainage (red drainage at right) and less acidic drainage (white drainage at left of photo) that originates from altered rocks and mines in the watershed.

Ferricrete (surficial deposits cemented by iron oxides) formation at the base of Cement Creek north of Silverton, Colorado.

Dr. Denise Akob and Dr. Karl Haase give a tour of U.S. Geological Survey laboratories to middle school students. The tour was part of the White House's My Brother's Keeper Day at the Lab.

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.

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 recently emerged mayfly collected downstream of the Cinnabar mercury mine site in central Idaho. 

Idealized diagram of a public water supply's water distribution system.

USGS scientist collecting a water sample from the stream prior to the swine manure spill.

USGS scientist sampling water at Horicon National Wildlife Refuge for analysis of avian influenza to determine if wild bird habitat is a reservoir of the virus.  

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.

The New Croton Dam is part of New York City's water supply system, Croton-on-Hudson, Westchester County, New York.

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. 

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.

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.

Field sampling in the Hells Canyon Reservoir Complex, with Dr. M. Marvin-DiPasquale at the bow of the sediment collection boat. Photographer: D. Krabbenhoft.