USGS analysis examined concentrations of chloride, dissolved solids and nitrate in groundwater
There was no change in concentrations of chloride, dissolved solids or nitrate in groundwater for more than 50% of well networks sampled in a new analysis by the U.S. Geological Survey (USGS) that compared samples from 1988 to 2000 to samples from 2001 to 2010. For those networks that did have a change, seven times more networks saw increases as opposed to decreases.
Approximately 6,000 public water systems will begin monitoring 28 chemicals and two viruses beginning in 2013
The U.S. Environmental Protection Agency (EPA) recently published a list of 28 chemicals and two viruses that approximately 6,000 public water systems will monitor from 2013 to 2015 as part of the agency’s unregulated contaminant monitoring program.
The program collects data for contaminants suspected to be present in drinking water but that do not have health-based standards set under the Safe Drinking Water Act.
Newly published research paper demonstrates test inaccuracies due to sample holding time
Water management services company Phigenics LLC recently announced the publication of a research paper that demonstrates up to 33% false-positive test results for Legionella bacteria when following conventional sampling methods.
U.S. EPA published table of human health benchmarks for 350 pesticides
The U.S. Environmental Protection Agency (EPA) has published a table of human health benchmarks for approximately 350 pesticides to enable states, water systems and the public to better determine whether the detection of a pesticide in drinking water or source waters for drinking water may indicate a potential health risk.
Advanced testing methods now allow pesticides to be detected in water at very low levels. These small amounts of pesticides detected in drinking water or source water for drinking water do not necessarily indicate a health risk.
Heptachlor epoxide, trichloroethane, aesthetic chlorine, acrylonitrile, TDS, xylenes, lead, arsenic, hexachlorocyclopentadiene … Certainly, some of the chemicals listed above are recognizable not only to you but also to the average consumer. Some of them are recognizable to you, but the average consumer would stumble through their pronunciation. Should you consider certifying the contaminants listed above?
Deciding which contaminant reduction claims to certify
San Antonio de Los Cobres, a community of 6,000 residents in the Andes Mountains in Argentina, faced a challenging arsenic concentration of up to 290 ppb in its water supply. It needed a solution to reduce the level to below the maximum contaminant level set by the World Health Organization (WHO) of 10 ppb.
Remote Andean town reduces arsenic with new treatment system
GE and SI will collect the contaminated liquid waste and send it off site for disposal
The U.S. Environmental Protection Agency (EPA) announced Wednesday that it has reached an agreement with the General Electric Co. (GE) and SI Group Inc. (formerly Schenectady Chemical) to collect and properly dispose of contaminated groundwater and liquid leaching from the Dewey Loeffel landfill that is threatening several nearby drinking water wells.
The company's Electromedia I and V filtration media are now compliant to NSF/ANSI Standard 61
Filtronics Inc.’s Electromedia I and Electromedia V filtration media now carry certification by NSF Intl. to be compliant to NSF/ANSI Standard 61 for contact with water. The review process included an inspection of Filtronics’ manufacturing facility in Anaheim, Calif., and testing of the media materials to ensure the safe use of these filter media in the treatment of drinking water.
Source water contains arsenic concentrations above recommended WHO levels
AdEdge Water Technologies recently shipped an arsenic treatment system to the Arica – Pago de Gomez Water Treatment Plant in Chile to reduce arsenic levels of 18 ppb in the water source to below the arsenic maximum contaminant level set by the World Health Organization of 10 ppb.
A recent report from the Environmental Working Group revealed the presence of hexavalent chromium in the tap water of 31 of 35 cities. Norman, Okla., had the highest level of all the cities tested. Water Quality Products (WQP) spoke with Dr. Robert Nairn of the University of Oklahoma (OU) to learn more about chromium-6.
Rebecca Wilhelm: What is chromium-6?