Images

Sensors are cleaned with an automatic wiper brush on the continuous water-quality monitors. 

Spring sampling location along Little Sandy River in southern Wyoming. Groundwater discharge that flows into the Upper Colorado River Basin varies in response to drought, which is likely due to aquifer systems that contain relatively young groundwater, according to a new U.S.

USGS scientist collects noble gas sample from spring site near Roaring Judy, Colorado. Groundwater discharge that flows into the Upper Colorado River Basin varies in response to drought, which is likely due to aquifer systems that contain relatively young groundwater, according to a new U

Water quality and sampling equipment deployed at spring site near Roaring Judy, Colorado. Groundwater discharge that flows into the Upper Colorado River Basin varies in response to drought, which is likely due to aquifer systems that contain relatively young groundwater, according to a new U.S

Harmful algal blooms turn water in Milford Lake emerald green

Harmful algal blooms turn water in Milford Lake emerald green

New technology is helping the USGS monitor harmful algal blooms

Harmful algal blooms turn lake water emerald green

Harmful algal blooms turn water in Milford Lake emerald green

USGS scientists monitor the water quality off a bridge near Sedgwick, Kansas. A new USGS study shows that water quality on the Little Arkansas River and in the Equus Beds aquifer has not substantially changed since 2007 recharge activities began in the Equus Beds aquifer.

The City of Wichita's Equus Beds Aquifer Storage and Recovery Phase II river intake structure near Sedgwick, Kansas. A new USGS study shows that water quality on the Little Arkansas River and in the Equus Beds aquifer has not substantially changed since 2007 recharge activities began in the Equus Beds aquifer.

USGS employees take samples in Bronx River for a Northeast stream Quality Assessment 

Screen capture of ModelMuse with the caption "This video briefly describes the Riparian Evapotranspiration package (RIP) package and how ModelMuse supports it."

Harmful algal blooms turn water in Milford Lake emerald green

USGS hydrologists Irene Fisher and Michael Como sample water quality on Long Island.

The USGS monitors water quality at the Sleeping Bear Dunes National Lakeshore in Empire, Michigan. 

The USGS monitors water quality at the Sleeping Bear Dunes National Lakeshore in Empire, Michigan. 

Did you know that most streams in the United States have groundwater flowing into them at least part of the time? Contribution of groundwater to total streamflow varies widely among streams but can have a significant affect on water quality and (or) volume.

A corn farm in northeast Iowa. A new USGS report shows that drought periods followed by rainfall caused nitrate levels to increase to the highest ever measured in some Midwest streams during a 2013 study. 

Cows feed on a farm in southern Wisconsin. A new USGS report shows that drought periods followed by rainfall caused nitrate levels to increase to the highest ever measured in some Midwest streams during a 2013 study. 

A small stream flows through corn fields in northern Indiana. A new USGS report shows that drought periods followed by rainfall caused nitrate levels to increase to the highest ever measured in some Midwest streams during a 2013 study.