June 2007 Volume 49 Number 6
Cover
	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
Features
	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 read more   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
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Columns
	A Water Daughter Makes Her Mark by Denise M. Roberts read more   WC&P Insight: What Are the UK Water Fittings Regulations? by  read more   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 by  read more   Letters by  read more