The Trump administration's proposed changes to the definition of “waters of the United States” (WOTUS) “decreases protection for our nation’s waters and does not support the objective of restoring and maintaining ‘the chemical, physical and biological integrity’ of these waters,” EPA’s Science Advisory Board said.

A decision by Maui County, Hawaii, appears to have ended hopes of farm groups for a favorable Supreme Court decision on the scope of the Clean Water Act.

The most agriculturally lucrative sector of California is the San Joaquin Valley, and the current threat to groundwater in this region could affect major crops.

A new analysis suggests the average level of nitrate contamination in private wells of the nation’s number one corn-producing state nearly doubled between 2002 and 2017.

EPA is sifting through widely divergent comments in an attempt to clarify the Clean Water Act's regulation of groundwater.

EPA is seeking comments on whether pollutants from a point source that reach surface waters by traveling through groundwater should be subject to Clean Water Act permitting requirements.