Skip to main content
U.S. flag

An official website of the United States government

Overview of water quality in principal aquifers, 2013-2021

By Water Resources Mission Area
Map of 15 principal US aquifers; pie charts showing proportion of inorganic contaminants exceeding human-health benchmarks
Original Thumbnail Medium

Detailed Description

Overview of water quality in Principal Aquifers, 2013-2021. The colored pie charts indicate the proportion of the area studied that contained a constituent in untreated groundwater at a concentration that exceeds a human-health benchmark for drinking water.

Sources/Usage

Public Domain.