Images

Hydrogeophysics Branch -- Storrs, Connecticut

Organic Chemistry Research Laboratory -- Sacramento, California. Small sample bottles with pollen inside

National Wildlife Health Center — Madison, Wisconsin. Digestive gland from a freshwater snail (Lymnaea stagnalis)

Passive Sampling Research—Columbia, Missouri. The polar organic chemical integrative sampler (POCIS - on the left) and semipermeable membrane devices (SPMDs - on the right) samplers are used for sampling hydrophilic organic chemicals from water. The SPMDs sampler can also be deployed for air sampling.

Confined swine feeding operation; taken by Kent Becker, unknown location.

Wolf Creek site map modified from Figure 1 of 'Organic geochemistry and toxicology of a stream impacted by unconventional oil and gas wastewater disposal operations, Orem and Others, 2017'.  

USGS scientist collecting samples of aquatic species from the Pike River, Wis., for later analysis of mercury contamination

Aquariums where male fathead minnows were exposed to the effluent from a wastewater treatment plant

Early life stage exposure laboratory study

Environmental Chemistry Laboratory — Columbia, Missouri. Customized extraction system

Hydrogeophysics Laboratory — Storrs, Connecticut. A saltwater tracer was injected into the shallow aquifer at a uranium-contaminated site in Colorado and monitored for 28 days using a combination of geophysical and well-sampling arrays; the sampling array is marked by the white standpipes adjacent to the central injection tank.

Bioactive Chemicals Research Laboratory — Boulder, Colorado. Fathead minnows (Pimephales promelas) swimming in an experimental aquarium. The aquarium is part of an experiment to assess endocrine disruption in fish.

Microbial Biogeochemistry Laboratory — Menlo Park, California. USGS scientist collecting samples of aquatic species from the Pike River, Wis., for later analysis of mercury contamination.

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). 

U.S. Geological Survey (USGS) scientist preparing samples for analysis of protein levels to normalize results from oxidative stress bioassays.

Scenic landscape from Hells Canyon Reservoir, Idaho

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

Michigan Bacteriological Research Laboratory — Lansing, Michigan. A microbiologist preparing a water sample

Landsat 8 captured this image of Lake Erie during a harmful algal bloom event on September 26, 2017.