The Alberta Centre for Toxicology tests drinking water to make sure it’s safe to drink. They use the
Guidelines for Canadian Drinking Water set by Health Canada to report safe levels of substances in drinking water, including those that can be harmful to your health. To understand your drinking water test results, use the information below.
Some of the results are reported using maximum acceptable concentration and the aesthetic objective.
Maximum acceptable concentration (MAC) is the highest amount of a substance in drinking water that is safe for a person to drink. This value is set to protect an average person from a substance in drinking water, if they drink 1.5 litres of water each day over 70 years.
Aesthetic objective (AO) looks at the taste, odor, and appearance of drinking water. The AO is the level of a substance used to decide if people will use or drink the water.
If you have any questions about your drinking water test results, please contact a
Public Health Inspector in your area.
Drinking water test results
Talk to your doctor if you have questions about substances in drinking water and if they could affect your heath.
7.0 to 10.5
200 mg/L or less
0.3 mg/L or less
250 mg/L or less
500 mg/L or less
The results for conductivity, cation/anion sum, ion balance, and percentage difference on your water test results are only used for lab purposes.
For more information about drinking water, visit:
Alberta Health Services – Information for your Home
Alberta Environment and Parks – Working Well
Current as of: October 11, 2018
Author: Environmental Public Health, Alberta Health Services
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