Quality of Groundwater Used for Public Supply in the Continental United States: A Comprehensive Assessment

American Chemical Society (ACS) | October 21st, 2022

Quality of Surface Waters of the United States, 1965, Parts 1 and 2, North Atlantic Slope Basins and South Atlantic Slope and Eastern Gulf of Mexico Basins

U.S. Geological Survey (USGS) | July 15th, 1970

Quality of Surface Waters of the United States, 1965, Parts 3 and 4, Ohio River Basin and St. Lawrence River Basin

U.S. Geological Survey (USGS) | July 15th, 1970

Quality of Surface Waters of the United States, 1965, Parts 5 and 6, Hudson Bay and Upper Mississippi River Basins and Missouri River Basin

U.S. Geological Survey (USGS) | July 15th, 1970

[caption id="attachment_38764" align="alignnone" width="533"] Screenshot[/caption]

[caption id="attachment_38764" align="alignnone" width="533"] Screenshot[/caption]

Quality of Surface Waters of the United States, 1965, Parts 7 and 8, Lower Mississippi River Basin and Western Gulf of Mexico Basins

U.S. Geological Survey (USGS) | July 15th, 1970

Quality of Surface Waters of the United States, 1965, Parts 9-11, Colorado River Basin to Pacific Slope Basins in California

U.S. Geological Survey (USGS) | July 15th, 1970

Quality of Water Colorado River Basin Progress Report No. 25

U.S. Bureau of Reclamation (USBR) | January 14th, 2017

The Colorado River and its tributaries provide water to about 35 - 40 million people and irrigation water to nearly 4.5 million acres of land in the United States (Mov

The Colorado River and its tributaries provide water to about 35 - 40 million people and irrigation water to nearly 4.5 million acres of land in the United States (Moving Forward, 2015;). The river also serves about 3.3 million people and 500,000 acres in Mexico (Cohen, 2011). The effect of salinity is a major concern in both the United States and Mexico. Salinity damages in the United States are presently estimated to be about $382 million per year at 2014 salinity concentrations, which includes 1.3 million tons of implemented salinity controls. This biennial report on the quality of water in the Colorado River Basin is required by Public Laws 84-485, 87-483, and the Colorado River Basin Salinity Control Act (Salinity Control Act) (Public Law 93-320, as amended by Public Laws 98-569, 104-20, 104-127, and 106-459).

Quality of Water from Domestic Wells in Principal Aquifers of the United States, 1991–2004: Overview of Major Findings

U.S. Geological Survey (USGS) | November 5th, 2009

This report is one of a series of publications, The Quality of Our Nation’s Waters, which describes major findings of the NAWQA Program on water-quality issues of regio

This report is one of a series of publications, The Quality of Our Nation’s Waters, which describes major findings of the NAWQA Program on water-quality issues of regional and national concern. This report presents a national assessment of the quality of water in private domestic wells based on samples from about 2,100 wells located in 48 states and tapping 30 regional aquifers used for water supply. Compared to previous investigations of domestic well water quality, “Quality of Water from Domestic Wells in Principal Aquifers of the United States, 1991–2004 —Overview of Major Findings” greatly expands the number of contaminants assessed in domestic wells and improves geographic coverage of wells sampled. More than 43 million people—about 15 percent of the U.S. population—rely on domestic wells as their source of drinking water (Hutson and others, 2004). The quality and safety of water from domestic wells, also known as private wells, are not regulated by the Federal Safe Drinking Water Act or, in most cases, by state laws. Rather, individual homeowners are responsible for maintaining their domestic well systems and for monitoring water quality. The lack of regular monitoring of domestic wells makes periodic assessments at national, regional, and local scales important sources of information about this key source of drinking water. This study from the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) assesses water-quality conditions for about 2,100 domestic wells. The sampled wells are located in 48 states and in parts of 30 regionally extensive aquifers used for water supply in the United States. As many as 219 properties and contaminants, including pH, major ions, nutrients, trace elements, radon, pesticides, and volatile organic compounds (VOCs), were measured. Fecal indicator bacteria and additional radionuclides were analyzed for a smaller number of wells. The large number of contaminants assessed and the broad geographic coverage of the present study provides a foundation for an improved understanding of the quality of water from the major aquifers tapped by domestic supply wells in the United States.

Quality of Water from Public-Supply Wells in the United States, 1993–2007: Overview of Major Findings

U.S. Geological Survey (USGS) | July 12th, 2010

In this study by the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS), chemical water-quality conditions were assessed in source (un

In this study by the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS), chemical water-quality conditions were assessed in source (untreated) groundwater from 932 public-supply wells, hereafter referred to as public wells, and in source and finished water from a subset of 94 wells. The public wells are located in selected parts of 41 states and withdraw water from parts of 30 regionally extensive water-supply aquifers, which constitute about one-half of the principal aquifers in the United States. Although the wells sampled in this study represent less than 1 percent of all groundwater-supplied public water systems in the United States, they are widely distributed nationally and were randomly selected within the sampled hydrogeologic settings to represent typical aquifer conditions. All source-water samples were collected prior to any treatment or blending that potentially could alter contaminant concentrations. As a result, the sampled groundwater represents the quality of the source water and not necessarily the quality of finished water ingested by the people served by these public wells.

Quantification Settlement Agreement and Related Agreements and Documents to which Southern California Agencies are Signatories

California Natural Resources Agency (CNRA) | October 10th, 2003