March 2005
Volume 47 Number 3
 
Cover
Basic Ion Exchange for Residential Water Treatment, Part 2
by Michael C. Keller
In our February issue, Keller explained the history of ion exchange, the manufacturing and softening processes, disinfection and standard removal methods. We now bring you part two, which begins with a look at efficiency factors...  read more
 
Real World Studies Utilizing Membrane Technology for SDWA
by Shannon P. Murphy
The world of water regulations and regulated water contaminants continues to change rapidly. In the next few years, public water systems will be impacted by several new water regulations that they will have to comply with...   read more
 
WHO Report: Nutrient Minerals in Drinking Water

The group was asked to examine several issues relating to the composition of drinking water that has undergone significant treatment relevant to drinking water guidelines aimed at protecting and enhancing public health...  read more
 
WQA to WHO: Official WQA Response to WHO’s Report
by Joseph F. Harrison & Rod Yoder
Dear World Health Organization: The Water Quality Association appreciates the opportunity to comment on the draft papers listed on the WHO website (www.who.int/water_sanitation_health/dwq/nutrients/en/) and presented by the participants of the WHO Workshop, 11-13 November 2003, in Rome on the topic: “Nutrient Minerals in Drinking Water and the Potential Health Consequences of Consumption of Demineralized and Remineralized and Altered Mineral Content Drinking Water.”...  read more
 
Features
Radon and Water Testing
by Stephen R. Tischler
On January 13, 2005 United States Surgeon General Richard Carmona issued a Health Advisory warning Americans about the health risk from exposure to radon in indoor air...  read more
 
Residential, Commercial, Industrial, Part 1
by C.F. “Chubb” Michaud
The water treatment industry is a highly evolved technology, but it did not evolve from a single great fountain of knowledge. Nor did it evolve in a single direction...   read more
 
An Introduction to Arsenic Adsorbents

As a general class, the arsenic adsorbents are all based on similar adsorbent chemistry. An insoluble metal oxide/hydroxide is the adsorbent, which is contained in some type of granular substrate that is porous enough to expose the adsorption sites to the water, yet robust enough to maintain its shape under the conditions of use...  read more
 
Perchlorate Detected in Drinking Water in 26 States
by AWWA report excerpts
Perchlorate has been detected in drinking water in 26 states and Puerto Rico, according to an occurrence study by the American Water Works Association (AWWA). Most of the detections were at levels below 12 micrograms per liter (µg/L). A microgram per liter equates to approximately one drop in 55,000 gallons.  read more
 
Perchlorate Occurrence Mapping
by AWWA report excerpts
The following is an excerpted version of the AWWA report. Additional information can be found at www.awwa.org.  read more
 
Web Exclusive
Columns
Viewpoint: Rain water read more
 
Dealer Profile: You Can Live Without Soft Water... But It`s Hard
by  read more
 
From 1` to 5`1`` Steve Cappos of Koch
by  read more
 
Efficient Certification with Product Bracketing
by Rick Andrew read more
 
Aerosol and Contact Routes of Microbial Disease
by Kelly A. Reynolds read more
 
Tech Talk: Compelling Displays Make Companies Compelling
by Jim Deady read more