Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
by Staff Writers
Washington DC (SPX) Apr 22, 2014
The Environmental Protection Agency's (EPA's) recommendations for treating water after a natural disaster or other emergencies call for more chlorine bleach than is necessary to kill disease-causing pathogens and are often impractical to carry out, a new study has found. The authors of the report, which appears in the ACS journal Environmental Science and Technology, suggest that the agency review and revise its guidelines.
Daniele Lantagne, who was at the Centers for Disease Control and Prevention (CDC) at the time of the study and is now at Tufts University, and colleagues note that after natural disasters such as floods, clean water can be scarce. To prevent the spread of water-borne illnesses, the EPA currently recommends "bottle, boil, bleach" in case of a water emergency.
That is, people should turn to bottled water as a first resort. If that's not an option, then they should boil available water to disinfect it.
As a last resort, they should add "1/8 teaspoon (or 8 drops) of regular, unscented, liquid household bleach for each gallon of water." But, as the researchers point out, 1/8 of a teaspoon is not the same as 8 drops. And both amounts are higher than CDC and World Health Organization recommendations.
To further evaluate the guidelines, the team tested different bleach treatment levels at six households around the country using water from various sources.
They found that the range of EPA-recommended doses (8 drops to 1/8 of a teaspoon) were higher than necessary to kill disease-causing pathogens in the samples. In a related project, they reported that even if the guideline were lowered, many people they surveyed would not be able to carry it out.
None had the right kind of bleach in the house, and few had the correct measuring devices. The researchers recommend a revision of EPA guidelines and more research into more practical water treatment products.
American Chemical Society
Water News - Science, Technology and Politics
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news 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 All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.|