Skip to main content
U.S. flag

An official website of the United States government

Overview of water quality in principal aquifers, 2013-2021

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.


Public Domain.