Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. 24/7 Space News .




WATER WORLD
New Insight on Vulnerability of Public-Supply Wells to Contamination
by Staff Writers
Washington DC (SPX) Aug 07, 2013


File image: public-supply well.

Key factors have been identified that help determine the vulnerability of public-supply wells to contamination. A new USGS report describes these factors, providing insight into which contaminants in an aquifer might reach a well and when, how and at what concentration they might arrive.

About one-third of the U.S. population gets their drinking water from public-supply wells.

"Improving the understanding of the vulnerability of public-supply wells to contamination is needed to safeguard public health and prevent future contamination," said Suzette Kimball, acting USGS Director.

"By examining ten different aquifers across the nation, we have a more thorough and robust understanding of the complexities and factors affecting water quality in our public supplies."

The study explored factors affecting public-supply-well vulnerability to contamination in ten study areas across the Nation. The study areas include Modesto, Calif., Woodbury, Conn., near Tampa, Fla., York, Nebr., near Carson City and Sparks, Nev., Glassboro, N. J., Albuquerque, N. Mex., Dayton, Ohio, San Antonio, Tex., and Salt Lake City, Utah.

Measures that are crucial for understanding public-supply-well vulnerability include: 1) the sources of the water and contaminants in the water that infiltrate the ground and are drawn into a well; 2) the geochemical conditions encountered by the groundwater; and 3) the range of ages of the groundwater that enters a well.

"Common sense might say that wells located near known contaminant sources would be the most vulnerable, but this study found that even where contaminant sources are similar, there are differences in public-supply-well vulnerability to contamination," said Sandra Eberts, the study team leader.

The study found that conditions in some aquifers enable contaminants to remain in the groundwater longer or travel more rapidly to wells than conditions in other aquifers. Direct pathways, such as fractures in rock aquifers or wellbores of non-pumping wells, frequently affect groundwater and contaminant movement, making it difficult to identify which areas at land surface are the most important to protect from contamination.

An unexpected finding is that human-induced changes in recharge and groundwater flow caused by irrigation and high-volume pumping for public supply changed aquifer geochemical conditions in numerous study areas. Changes in geochemical conditions often release naturally occurring drinking-water contaminants such as arsenic and uranium into the groundwater, increasing concentrations in public-supply wells.

Knowledge of how human activities change aquifer conditions that control which contaminants are released to groundwater and how persistent those contaminants are once in the groundwater can be used by water managers to anticipate future water quality and associated treatment costs.

The quality of drinking water from the Nation's public water systems is regulated by the U.S. Environmental Protection Agency under the Safe Drinking Water Act. The USGS studies are intended to complement drinking water monitoring required by federal, state and local programs.

This new report, Factors affecting public-supply-well vulnerability to contamination: understanding observed water quality and anticipating future water quality, was done by the USGS National Water-Quality Assessment.
.


Related Links
USGS National Water-Quality Assessment Program
Water News - Science, Technology and Politics






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





WATER WORLD
Veolia says profits down to a trickle, shares sparkle
Paris, France (AFP) Aug 05, 2013
French utilities group Veolia Environnement reported Monday a six-month profits slump owing to provisions and warned that its activities in China were slowing, but its shares climbed as it held onto targets to cut costs and debt. The group, which provides water and waste management services in many countries, eked out a profit of just 4.0 million euros ($5.3 million) in the first half of thi ... read more


WATER WORLD
Environmental Controls Move Beyond Earth

Bad night's sleep? The moon could be to blame

Moon Base and Beyond

First-ever lunar south pole mission could be attempted by 2016

WATER WORLD
Full Curiosity Traverse Passes One-Mile Mark

Curious craters on Mars said result of impacts into ancient ice

NASA Begins Launch Preparations for Next Mars Mission

NASA Curiosity Rover Approaches First Anniversary on Mars

WATER WORLD
Study: Teleportation would have a slight time-to-transmit problem

NASA technologist makes traveling to hard-to-reach destinations easier

First Liquid Hydrogen Tank Barrel Segment for SLS Core Completed

Tenth Parachute Test for NASA's Orion Adds 10,000 Feet of Success

WATER WORLD
China launches three experimental satellites

Medical quarantine over for Shenzhou-10 astronauts

China's astronauts ready for longer missions

Chinese probe reaches record height in space travel

WATER WORLD
NASA's Firestation on way to ISS

Weekly recap from the International Space Station expedition lead scientist

NSBRI Wants Ideas To Support Space Crew Health and Performance

NASA narrows list of possible culprits in spacesuit water leak

WATER WORLD
Next Ariane 5 is readied to receive its dual-satellite payload

Russia to restart Proton rocket launches after crash

Japanese rocket takes supplies, robot to space station

SpaceX Awarded Launch Reservation Contract for Largest Canadian Space Program

WATER WORLD
New Explorer Mission Chooses the 'Just-Right' Orbit

'Blinking' stellar system may yield clues to planet formation

Pulsating star sheds light on exoplanet

Chandra Sees Eclipsing Planet in X-rays for First Time

WATER WORLD
Discovery could lead to end of sunburn pain

Alphasat deploys its giant reflector in orbit

Largest neuronal network simulation achieved using K computer

Mission Criticality of Space Mechanisms - Part 1




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement