“Arsenic Found in Groundwater.” How many times have you seen that headline? There is no doubt that arsenic has become a common household term, used not only by teenagers studying the periodic table but also by adults who have long forgotten their high school chemistry classes.
In the last 10 years, arsenic has made headlines for various reasons. Most deal with human exposure and its associated risks.
Arsenic is present in natural deposits in the earth. It can enter drinking water supplies from these deposits or from agricultural and industrial activities.
Developing less expensive POE systems for arsenic treatment
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
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.
The U.S. Geological Survey (USGS) released a report in August revealing that 20% of untreated water samples from wells across the U.S. contain concentrations of trace elements exceeding human health benchmarks. Raissa Rocha, editorial intern for Water Quality Products, spoke with Joe Ayotte, USGS hydrologist and lead author of the study, about the report and the occurrence of trace elements in groundwater.
Raissa Rocha: What was the purpose of this study?
In 1986, California voters approved an initiative to address growing concerns about exposure to toxic chemicals. That initiative became the Safe Drinking Water and Toxic Enforcement Act of 1986, better known Proposition (Prop) 65. The act requires the state to publish a list of chemicals known to cause cancer, birth defects or other reproductive harm. This list, which must be updated at least once a year, has grown to include approximately 800 chemicals since it was first published in 1987.
Aiming for Arsenic
Preemptive testing can prevent costly penalties in California
When the McGraw Hill Data Center in East Windsor, N.J., was being built, the local municipal authority informed the company that it did not have the capacity to support the makeup water for the data center’s condensers or chill water plant. A new well was drilled to serve the plant; however, the groundwater supply had iron and manganese levels that exceeded regulatory limits.
System resolves high contaminant concentrations for data center
Elevated levels of arsenic, iron and manganese prompted Brandywine Elementary School in Greenfield, Ind., a small town just east of Indianapolis, to seek a treatment solution for the school’s drinking water. The water system is served by one well that provides drinking water for approximately 330 students in kindergarten to fifth grade.
In July 2009, Ladd Eng. Inc. contacted AdEdge Technologies Inc. to provide a proposal for the Brandywine Elementary School in the Southern Hancock School District.
System remedies elementary school’s high arsenic, iron and manganese
Arsenic and its compounds have been known to be toxic for millennia. Arsenic trioxide (As2O3), often referred to as white arsenic, was a favored poison in the Middle Ages because it had little odor or taste, enabling it to be easily incorporated into the food or drink of a victim. As little as 300 mg can be fatal to an average person.
Solutions to an age-old threat