ANSI/NSF Standard 60
http://www.ul.com/eph/wtrstndrds.htm

CDC
http://www.cdc.gov/

FDA
http://www.fda.gov/

ASHRAE
http://ashrae.org/

TAPPI
http://www.tappi.org/s_tappi/index.asp

CTI
http://www.cti.org/

AWT
http://www.awt.org/

Cleaver Brooks
http://www.cleaver-brooks.com/

NACE International
http://www.nace.org/content.cfm?parentid=1001¤tID=1001

Water Environment Association
http://www.wef.org/Home

American Chemical Society
http://portal.acs.org/portal/acs/corg/content

EPA
http://www.epa.gov/

ChemFinder
http://chemfinder.cambridgesoft.com/