June 2007
Volume 49 Number 6
GRPD Comparison of Two Activated Carbon Felts
by Henry Nowicki and Bud Carr
The test method, Gravimetric Rapid Pore Size Distribution (GRPD), is the best available technology to characterize activated carbons and many other sorbents. GRPD quickly provides clients with the broadest and deepest information about their materials physical and performance opportunities.   read more
Activated Carbon Market--Tariff Update or Duty is in the Eyes of the Beholder
by Ken Schaeffer
The final tariff rates for steam activated carbon imported into the US from China were announced by the Department of Commerce (DOC) in February 2007 and the International Trade Commission (ITC) voted unanimously to affirm the new tariff rates in March 2007.   read more
Microbiological Testing of Activated Carbon Materials
by George Nowicki and Barbara Sherman
In order to assure a safe supply of drinking waters, microbiological testing of the materials used to purify the raw water supply (such as activated carbon sorbents) needs to be regularly scheduled. Previously, no regular testing existed for microbial contaminants on...  read more
Water Softener Testing and Certification: Why Two Standards?
by Thomas P. Palkon
Companies frequently ask the Water Quality Association (WQA), "Whats the difference between WQAs S-100 Residential Water Softener Testing Standard and the NSF/ANSI 44 Residential Water Softener Testing Standard? The simple answer is that both standards have been almost completely harmonized.   read more
Water Reuse Technologies: The Wave of the Future, Part 2
by Peter S. Cartwright
The vast majority of membrane system failures occur as the result of membrane fouling. This fouling is usually caused by one or more of the following mechanisms:...  read more
WQA Recertification Quiz

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Overview of the Bottled Water Industry
by Joseph K. Doss
The bottled water industry has experienced increased demand for many years and 2006 was no exception. According to recent statistics released by Beverage Marketing Corporation, US bottled water sales and consumption continued to climb in 2006, as consumers increasingly chose bottled water over other beverages.  read more
Web Exclusive
A Water Daughter Makes Her Mark
by Denise M. Roberts read more
WC&P Insight: What Are the UK Water Fittings Regulations?
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Membership in the NSF International Joint Committee on Drinking Water Treatment Units
by Rick Andrew read more
Immigration and Infectious Disease: Increases in Neurocysticercosi
by Kelly A. Reynolds, MSPH, Ph.D. read more
Viewpoint: WC&P Buyer's Guide
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