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Background Information

Pesticide transformation products (TPs) may be a critical missing piece of the toxicity puzzle for aquatic life in small U.S. streams, according to a...

A new USGS study estimates total nitrogen (N) and total phosphorus (P) yields from catchments throughout the Mississippi/Atchafalaya River Basin...

Mixtures of organic chemicals are ubiquitous in small U.S. streams, reports a new study by the U.S. Geological Survey. In many streams the mixtures...

The USGS Water Resources Mission Area has prepared an Environmental Assessment in accordance with the National Environmental Policy Act for a new...

A new USGS study reports that about 45% of public-supply wells and about 37% of U.S. domestic supply wells have concentrations of lithium that could...

Streamflow in the Southwestern U.S. is projected to decrease by as much as 36–80% by the end of this century, reports a new study by the U.S...

A new USGS study reports that about 2.3 percent of drinking-water wells in the U.S. have concentrations of strontium at levels that present a...

A new 3-D model predicts pH in groundwater at all depths across the 25-state span of the glacial aquifer system, reports an article by the USGS. The...

A new USGS study has identified factors that contribute to high nitrate in base flow in streams flowing into Chesapeake Bay. Land use, organic carbon...