Sorry, that is incorrect.
However, you are on the right track! WEF was previously called the Federation of Sewage Works Associations (1928), the Federation of Sewage and Industrial Wastes Associations in 1950, and the Water Pollution Control Federation in 1960. The name was changed to the Water Environment Federation in 1991 to reflect an expanded focus of non-point and point sources of pollution.
Thanks for taking the quiz!