October 2003: Volume 45, Number 10
Arsenic and the ANSI/NSF Drinking Water Treatment Unit Standards
by Rick Andrew
Arsenic is a naturally occurring metal that’s present in many residential water sources. Many consumers have no worries about arsenic as surveys of U.S. drinking water indicate that about 80 percent of water supplies have less than 2 micrograms per liter (g/L) of arsenic...
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