Images

View of the lab from the outside, looking through glass window at scientist prepping samples for analysis.

Five plastic sample bottles with water samples from around the United States, with water color ranging from clear to yellow, being prepared for analysis.

USGS scientist analyzing surface water samples for dissolved organic carbon concentration and characterization.​

USGS scientist weighing out a sediment sample from a glass sample bottle onto laboratory analytical balance for mercury analysis.

USGS scientist rinsing white plastic Teflon sample bottle with deionized water in a laboratory.

USGS scientist conducting manual total mercury analysis​ in a laboratory.

USGS scientist preparing a sample for metal analysis​. A close up view of gloved hand pouring water sample from Teflon plastic tube to amber glass sample bottle.

Water distillation equipment for methylmercury analysis in a mercury research laboratory.

USGS Researchers (GLSC; Ann Arbor, MI) find a few different year classes (ages) in the spring catches of alewife (Alosa pseudoharengus) during a spring prey fish assessment in northeastern Lake Michigan near Sturgeon Bay. Photo credit: Kristy Phillips, USGS.

Research Fisheries Biologist Owen Gorman, Great Lakes Science Center, Lake Superior Biological Station attends the Northland College Job Fair on 30 March 2023. Photo Credit: Kelby Youngberg.

Physical Scientist Owen Stefaniak retrieves surface water samples from an autosampler at the upstream Infall site near the Air Guard 128^th Air Refueling Wing base during an overnight winter storm.

Physical Scientist Owen Stefaniak collects a surface water grab sample for chloride analysis while a multiparameter sonde takes a water quality measurement near the upstream Infall site near the Air Guard 128^th Air Refueling Wing base in Milwaukee, Wisconsin.

Overhead view of technician collecting a water sample of a tributary of Oak Creek, in Milwaukee, Wisconsin.

One of four streamgaging stations with autosamplers used in study to detect phosphorus in receiving waters from airport deicer runuff.

Owen Stefaniak collects a water sample of a tributary of Oak Creek, in Milwaukee, Wisconsin. The tributary is locoated at the southeast corner of General Mitchell International Airport property, just outside the perimeter fence. The airport runway is visible beyond the fence.

Owen Stefaniak and Kathryn Johncock collect water samples of a tributary of Oak Creek, in Milwaukee, Wisconsin. The tributary is locoated at the southeast corner of General Mitchell International Airport property, just outside the perimeter fence.

Owen Stefaniak inspects equipment at streamgage 040871473, Wilson Park Creek @ GMIA Infall at Milwaukee, Wisconsin. Wilson Park Creek at Gmia Infall at Milwaukee, WI - USGS Water Data for the Nation.

Two technicians deicing a plane at Milwaukee General Mitchell International Airport in winter. They are applying Type I aircraft deicer (which is orange) to the plane. Type I deicer is typically applied hot (hence the steam) and it is used to remove existing ice and snow. This will then usually be followed with Type IV (which is green) to prevent new ice.

Hydrologic Technician Jarvis Kaderlik makes a stream discharge measurement using a remote-controlled M9 ADCP (acoustic Doppler current profiler) on the Wisconsin River, near streamgage 05391000 Rainbow Lake near Lake Tomahawk, Wisconsin.

View of downtown Milwaukee, Wisconsin from Pier Wisconsin Cruise dock in winter.

View of downtown Milwaukee, Wisconsin from Pier Wisconsin Cruise Dock in winter.