Drinking water advisory statistics are for federally maintained systems on First Nations reserve lands only. These numbers do not include private systems or systems in Inuit communities.

Drinking water advisories include short-term (under 1 year) and long-term (more than 1 year) boil water advisories, do not consume advisories, and do not use advisories for First Nation communities in Canada.

Calculating the number of drinking water advisories is a complex process. Water First relies on information from several different sources. 

Sources: www.watertoday.ca, www.sac-isc.gc.ca, www.fnha.ca.

Last Updated: July 2026