Images

domestic well in the north Atlantic coastal plain. Photo from the USGS circular 1353 "Water Quality in the Northern Atlantic Coastal Plain Surficial Aquifer System, Delawarem Maryland, New Jersey, New York, North Carolina, and Virginia, 1988-2009."

Animal manure being applied as fertilizer. Photo from USGS circular 1354 "Water Quality in the Principal Aquifers of the Piedmont, Blue Ridge, and Valley and Ridge Regions, Eastern United States, 1993 - 2009." Animal manure being applied as fertilizer is related to the highest nitrate concentrations

USGS employee sampling a public supply well for water quality analysis

Noxious Algal Bloom in an estuary along the Massachusetts coast. Photo from the USGS circular 1360 "Water Quality in Pricipal Aquifers of the United States, 1991-2010."

USGS employee taking a measurement on a domestic groundwater well. Photo from the USGS circular 1360 "Water Quality in Pricipal Aquifers of the United States, 1991-2010."

Example output from REFDSS showing a “Flow Versus Habitat Chart”, which is a means of visualizing the habitat area as a function of streamflow (discharge).

Example of SSEBop Eta product: Spatial distribution of (A ) annual evapotranspiration (millimeters per year) and (B ) evapotranspiration (millimeters per day) on the day of satellite overpass (July 6, 2013) in a selected part of the southern Willcox irrigation district in Arizona. Modified from G.B. Senay, USGS, written commun., Oct. 26, 2015.

Estimates of groundwater discharge to streams (baseflow) at 229 sites in the Upper Colorado River Basin. Groundwater discharge to streams contributes an average of 48 percent of total streamflow in the UCRB.

USGS streamgage at Snake River, WY (03011000)

San Juaquin Valley, CA Pumping Well. From USGS circular 1182 "Land subsidence in the United States."

Colorado Basin Focus Area Study carousel

High level of selenium in fish, fisherman notice sign posted at Sweitzer Lake State Park in the lower Gunnison River Basin in western Colorado. Photo from the USGS circular 1360 "Water Quality in Pricipal Aquifers of the United States, 1991-2010."

USGS employees sampling a groundwater well for groundwater quality data.

Drinking water from a faucet

Photo of a public supply well from the USGS Floridian Circular 1355 "Water Quality in the Upper Floridian Aquifer and Overlying Surficial Aquifers, Southeastern United States, 1993-2010."

Colorado Basin Focus Area Study Map

Public Supply Water Withdrawls, Transfers, and Use by Source, Subbasin,and Subwatershed in the Delaware River Basin, 2010

USGS employee sampling a groundwater well.

Photo of a domestic public supply well from the USGS Floridian Circular 1355 "Water Quality in the Upper Floridian Aquifer and Overlying Surficial Aquifers, Southeastern United States, 1993-2010."

Sedimentary rock. Photo from the USGS circular 1360 "Water Quality in Pricipal Aquifers of the United States, 1991-2010."

Public-supply wells pump higher volumes of water than domestic-supply wells.  This photo appears in Circular 1352, Water Quality in the Glacial Aquifer System, Northern United States, one of a series of circulars on groundwater quality in the