Survey of Drinking Water Plants

Summary of changes

Activity on this program started: 2008

Reference period of change - 2013

Data sources - The use of administrative data to replace or complement survey data is a priority for Statistics Canada. Efforts to achieve this goal involve the Survey of Drinking Water Plants where respondents in Québec are not surveyed by Statistics Canada. Instead, the data are collected by an existing survey administered by the Ministère des Affaires municipales, des Régions et de l'Occupation du territoire and the results are shared with Statistics Canada.

Data accuracy - With the change in data collection for Québec respondents, comparisons from a time series perspective should be made with caution.

Collection instrument - The revised 2013 questionnaire was not tested because the only changes made were to remove or restrict the scope of some questions.

The primary differences between the 2013 questionnaire and the previous one are as follows:

- the raw/source water quality section was restricted to surface water only
- the data collected in the raw/source water quality section was reduced to three monthly parameters, and annual data is no longer collected.

Reference period of change - 2011

Instrument design - The revised 2011 questionnaire was tested in both official languages in the fall of 2010 at 9 locations (5 in Ontario and 4 in Québec).

Collection instrument - The primary differences between the 2011 questionnaire and the previous one are as follows:

- one year of data was collected instead of three
- questions on the use of water by sector were added
- the number of parameters in the raw/source water quality section was reduced, and annual instead of monthly data were requested for the majority of them
- all questions on treated/potable water quality were removed

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