Due to the large size of this report, it has been split into 3 Parts. This report presents the findings of water quality monitoring and surveys on the Athabasca River system by Alberta Environmental Protection in the years 1990-93. Some additional data prior to 1990 are included where appropriate. Water quality has been monitored by means of longitudinal synoptic surveys, recording meters, and a network of regular sampling sites. The effects of effluents are quantified and evaluated with reference to the Alberta Ambient Surface Water Quality Interim Guidelines (AWQG) and the Canadian Water Quality Guidelines (CWQG). The results of this set of surveys are compared with previous winter water quality surveys from 1988 and 1989.