During the July 1970 bacterial water quality survey, the bacterial levels at most stations on Lower Beverley Lake were below the water quality criteria for total body contact recreation. Higher bacterial levels occurred at stations 1 and 2 on Delta Creek, at stations 18D (depth) and 24 off Farnham Creek and at station 31 near Cooligan Creek. These levels were attributable to the effects of rainfall and the resulting runoff. However, further investigations will be required to determine if the rainfall effects were masking any pollution sources in these areas.