Item talk:Q58379

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

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.

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