Several studies were initiated in 2002 to address concerns related to a fish kill and metal levels in sediments from Wabamun Lake. This study was conducted by Alberta Environment to determine the occurrence and temporal and spatial variability of disinfection by-products (DBPs) in treated water from the Wabamun Lake Water Treatment Plant (WL-WTP), at sites in the vicinity of the treated water discharge, and at other sites further away within the lake. This report provides the findings of the sampling program.