1914 Continuous flow experimental plant set up at Davyhulme.


1919 Activated Sludge Ltd.








1960 Norstal Templewood Hawksley




1972 Templewood Hawksley Activated Sludge




1976 Hawker Siddeley Water Engineering incorporating Neckar Water Engineering




1988 Water Engineering (Jones Group)




1990 Water Engineering (North West Water)




1995 WABAG Water Engineering (Deutsche Babcock Group)




1999 VA TECH WABAG UK Ltd (VA TECH Group)




2004 Water Engineering Limited (Private Company)




2009 Environmental Dynamics Inc (Europe)