Unified Interior Regions

With the release of US Topo maps for Florida and Illinois, the continental US is now covered with the new digital quadrangles
 

At least one contaminant was found at levels of human-health concern in about one third of untreated groundwater samples collected from wells in the Cambrian-Ordovician aquifer system, according to a recent report by the U.S. Geological Survey.

Streamflow levels are below normal across much of the Midwest states of Iowa, Nebraska, Illinois and Wisconsin, according to the U.S. Geological Survey. Many states are experiencing severe drought, such as Iowa, where flows are less than 25 percent of normal streamflow conditions for the majority of the state. 

Lake Erie and its largest tributaries are suitable habitats for invasive Asian carps to reproduce and mature, according to a new U.S. Geological Survey study.

Porter, IN – Water quality information collected by local officials may provide increased beach access while minimizing swimming-related illnesses from harmful bacteria, according to a new U.S. Geological Survey study.  

More than 280 million acre-feet of groundwater has been withdrawn from the Mississippi embayment aquifer system between 1870-2007, according to a new water modeling tool developed by the U.S. Geological Survey.

A harmless red dye will temporarily discolor the Des Plaines River near Lemont, Ill., for scientific research purposes starting on Nov. 15.

Note:  This study has been postponed due to high water levels on the Des Plaines River. It will be rescheduled within the next few months.

A harmless red dye will temporarily discolor the Des Plaines River near Lemont, Ill., for scientific research purposes starting on Aug. 2.

The National Earthquake Prediction Evaluation Council has issued a new report in which independent experts conclude that current USGS estimates for significant earthquake hazards in the New Madrid Seismic Zone—affecting eight central and eastern U.S states—are based on sound science.

Approximately 13 million metric tons of rare earth elements (REE) exist within known deposits in the United States, according to the first-ever nationwide estimate of these elements by the U.S. Geological Survey.

Observers along Chicago’s 63rd Street Beach might notice the water has turned bright red-orange. It is all part of a scientific study to see how Lake Michigan’s waters move along the beach.