Sodium in drinking water

People suffering from hypertension or congestive heart failure may require a sodium-restricted diet, in which case the intake of sodium from drinking water could become significant.

Sodium levels are routinely monitored in all government regulated water supplies in the province of Ontario. The aesthetic objective for sodium in drinking water is 200 mg/L, at which point it can be detected through a salty taste. Sodium is not considered a toxic element. A maximum acceptable concentration for sodium in drinking water has, therefore, not been specified.

The average intake of sodium from water is only a small fraction of that consumed in a normal diet. However, people suffering from hypertension or congestive heart failure may require a sodium-restricted diet, in which case the intake of sodium from drinking water could become significant.

Below are some examples of sodium content from Health Canada’s Nutrient Value of Some Common Foods:

Water systems reported to have sodium concentrations higher than 20 mg/L are listed below. Many of the distribution systems within a community may reflect a blended supply of water. Details regarding specific water supplies may be obtained by contacting the local municipal office.

FacilitySodium (mg/L)Resample
C.A. MacMillan Place Well Supply, Webbwood, 201520.920.4
Chapleau Drinking Water System, 201826.323.1
Dowling Drinking Water System, 201529.2 to 35.030.3 to 35.6
Falconbridge Drinking Water System, 201521.7 to 25.321.1 to 28.2
Gervais Trailer Park, Chapleau, 2015155-
Gogama Well Supply, 2013-1422.921.8
Humarcin Residents' Organization, Sudbury, 2017106-
Maytown Mobile Home Village, Massey, 201345.646
Onaping/Levack Drinking Water System, 201565.752.9
Peace Valley Trailer Park, Wahnapitae, 2011 107.1-
Residence de Pionniers de Noëlville, 202097.0-
Sudbury Drinking Water System-David Street, 201552.852.3
Sudbury Drinking Water System-Garson, July/November 201524.5/58.523.0/56.4
Valley Drinking Water System, May/November 201524.2 to 34.4/26.6 to 72.630.9/26.2 to 70.1
Vermilion Water Treatment Plant, 201820.420
Villa Notre Dame Well Supply, 2020 30.330.5
Warren Well Supply, 2017105104

This item was last modified on February 24, 2016