This map shows the ratio of surface freshwater intake to water yield for August 2013, with the exception of drainage regions 7, 8, 16, 17, 18, which use the ratio of August intake to the long-term minimum monthly water yield. Surface freshwater intake aggregates data from the Survey of Drinking Water Plants, 2013 and the Industrial Water Use Survey, 2013 with estimates of agricultural water use for 2013 based on the Agricultural Water Use Survey and the Alberta Irrigation Information report.

Data for water use by the oil and gas industry and households not supplied by a public water provider are also excluded.