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The Water Environment Federation (WEF) is an organization of engineers and industry related to wastewater, water, and water reuse. WEF, founded in 1928, was formerly known as the "Federation of Sewage Works Associations" and the "Water Pollution Control Federation (WPCF)."The WEF network includes water quality professionals from 76 Member Associations in 30 countries. It has headquarters in Alexandria, Virginia.