The Association was started on February 16. 1976, in Edmonton by an Ad Hoc Committee consisting of Gerald Samuel. Ron Bayne, Cal Johnston, Ernie Corry, Jim Parker, Herb Zinger, Phil Richard, John Thoma, Denis Gray and Rene Chartrand. The committee was invited to meet by Gerald Samuel, Alberta Environment and Ron Bayne and Cal Johnston, both directors of the Western Canada Water and Sewage Conference.
The Ad Hoc Committee formulated a name and a constitution for the Association. It also arranged for the first general meeting of Alberta operators to be held in conjunction with the 1976 Western Canada Water and Sewage Conference Convention held in Winnipeg, Manitoba. Notice of the meeting and an election ballot for the first executive was given the widest possible distribution to operators and municipalities in Alberta.
The first members joined the Association on September 28, 1976, for the 1976/77 year (September to September). At the first annual general meeting held on September 29, 1976, the first executive was announced. It consisted of:
Currently the Association provides service to operators as follows;
| Ron Bayne - Feb., 1976 - Nov., 1977 | Ernie Corry - Nov., 1977 - Nov., 1978 |
| Herb Zinger - Nov., 1978 - Nov., 1979 | Ken Elstone - Nov., 1979 - Jan., 1981 |
| Bob Quinn - Jan., 1981 - Nov., 1981 | Steve Blonsky - Nov.,1981 - Nov., 1982 |
| Jim Gratz - Nov., 1982 - Nov., 1983 | Ken Elstone - Nov., 1983 - Dec., 1984 |
| John MacDonald - Dec., 1984 - Dec., 1985 | Harold Lewis - Dec., 1985 - Dec., 1986 |
| Rod Park - Dec., 1986 - Dec., 1987 | Dalton Stafford - Dec., 1987 - June, 1988 |
| Louis Hedberg - June, 1988 - June, 1989 | Steve Blonsky - June, 1989 - June, 1991 |
| Ed Westerbeek - June, 1991 - March, 1993 | Doug Thorson - March, 1993 - March, 1994 |
| Lynne Coulter - March, 1994 - March, 1995 | Bert Miller - March, 1995 - March, 1996 |
| Andy Bebbington - March, 1996 - March, 1997 | John Barrett - March, 1997 - March, 1998 |
| Terry Chapman - March,1998 - March, 1999 | Mike Pelletier - March, 1999 - March 2000 |
| Doug Thorson - March, 2000 - March 2001 | Gerard Hollman - March, 2001 - March 2002 |
| Scott Chant - March, 2002 - March, 2003 | Andrew Maguire - March, 2003 - March, 2004 |
| Allan Kendrick - March, 2004 - March, 2005 | K.C. Stone - March, 2005 - March, 2006 |
| Carl McDonnell - March, 2006 - March, 2007 | Jeff Johnston - March 2007 - March, 2008 |
| Kim Fath - March, 2008 - March, 2009 | Nancy McAteer - March 2009 - March 2010 |
| Dwayne Cikaluk - March 2010 - Present |