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The Survey of Drinking Water Plants is conducted to provide Canadians with national and regional information related to the production of drinking water. The survey is a census of drinking water plants serving 300 or more people, and asks for information on volumes of water treated, type of treatment, financial aspects of the operation, as well as the quality of the raw water used as a source for the treatment plant.

This survey is part of the Canadian Environmental Sustainability Indicators (CESI) initiative. The data collected will be used in CESI's reporting activities. The survey results offer a national portrait of treatment processes, their costs and source water quality for facilities that range from complex to basic. The data are used to track the state of stocks of water on a regional and national basis in Canada and in the development of environmental accounts and indicators.