Eliza, contact your water department and ask to see the analyses, if they are not on line.
Calgary tests for 150 parameters. Analyses are carried out constantly.

Basic water chemistry:
Color, hardness, pH, total dissolved solids, turbidity, temperature.

Inorganic Substances:
Amounts found, source and plant treatment.
Aluminum, arsenic, barium, cadmium, calcium, free chlirine residual, chromium, copper, fluoride, iron, lead, magnesium, manganese, mercury, nickel, nitrite, nitrate, potassium, sodium, sulfate, zinc.

Microbiological Analyses
Coliforms

Volatile Organics
By-products of chlorination
http://www.calgary.ca/UEP/Water/Documents/Water-Documents/2011_Water_Report.pdf
(I just googled Calgary, city water analysis)

Ed T, I found the report useful. All research is ongoing, in science no results are clearcut and final.