Groundwater quality in the Coastal Lowlands aquifer system, south-central United States

Fact Sheet 2016-3077
National Water Quality Program
National Water-Quality Assessment Project
By:  and 



Groundwater provides nearly 50 percent of the Nation’s drinking water. To help protect this vital resource, the U.S. Geological Survey (USGS) National Water-Quality Assessment (NAWQA) Project assesses groundwater quality in aquifers that are important sources of drinking water. The Coastal Lowlands aquifer system constitutes one of the important areas being evaluated. One or more inorganic constituents with human-health benchmarks were detected at high concentrations in about 12 percent of the study area and at moderate concentrations in about 18 percent. Organic constituents were not detected at high or moderate concentrations in the study area.

Suggested Citation

Barlow, Jeannie R.B., and Belitz, Kenneth, 2016, Groundwater quality in the Coastal Lowlands aquifer system, South-Central United States (ver. 1.1, September 2020): U.S. Geological Survey Fact Sheet 2016-3077, 4 p.,

ISSN: 2327-6932 (online)

Study Area

Table of Contents

  • Background
  • Overview of Water Quality
  • Results: Groundwater Quality at the Depth Zone Used for Public Supply in the Coastal Lowlands Aquifers
  • Benchmarks for Evaluating Groundwater Quality
  • Spatial Distribution of Constituents in Concentrations Above Human-Health Benchmarks
  • Principal Aquifer Studies
  • Selected References
Publication type Report
Publication Subtype USGS Numbered Series
Title Groundwater quality in the Coastal Lowlands aquifer system, south-central United States
Series title Fact Sheet
Series number 2016-3077
DOI 10.3133/fs20163077
Edition Version 1.0: January 19, 2017; Version 1.1: September 16, 2020
Year Published 2016
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) National Water Quality Assessment Program
Description 4 p.
Country United States
State Alabama, Florida, Louisiana, Mississippi, Texas
Other Geospatial Coastal Lowlands Aquifer System
Google Analytic Metrics Metrics page
Additional publication details