The Gazette Montreal's tap water is full of wholesome minerals and compares favourably with the water of other major North American cities, a McGill University study shows. Our city's tap water has relatively high levels of calcium and magnesium - minerals that are considered healthy for you. It also has lower levels of sodium - a mineral which in large quantities can cause hypertension. For example, some distilled bottled waters have absolutely no calcium or magnesium, whereas certain tap-water sources may have significantly important levels of these minerals.
Magnesium plays a role in warding off heart disease.
The researchers examined the tap water of the 25 most populous cities in Canada and the United States. Mineral content varied widely among the cities. The water of El Paso, Tex., had the highest levels of sodium, with 195 milligrams per litre. The maximum recommended daily consumption of sodium is 3,000 milligrams per litre. However, many people live on sodium-restricted diets of 500 milligrams a day.