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Drinking water - Taste, odour and apperance

The taste, odour and appearance of your drinking water may vary at different times of the year due to events such as spring runoff. A change in the appearance of your drinking water does not mean it is unsafe to drink.

On this page, find answers to common drinking water questions about taste, odour and appearance. If you have any other questions about the taste, smell or odour of your water please call 311.

Questions about your drinking water?
For answers to other common drinking water questions like water hardness or water pressure, visit Drinking Water in Calgary.

Why does my water smell musty or have an unusual odour?

If the musty odours occurs only at one faucet, the odour is related to something at or near the faucet.

Try cleaning the drain, this often removes the odours. Please note unusual tastes or odours are aesthetic in nature and do not pose a health risk.

What should I do if my water tastes stale?

Drinking water may taste stale if faucets have not been used recently. Running the cold water tap briefly will allow fresh water from the water main to your tap.

My water has a milky or cloudy appearance. Should I be concerned?

Air bubbles in water may cause a milky or cloudy appearance, especially in cold water. These bubbles pose no health risk.

Cloudiness appears more often in the winter, when the water is cold. Allowing water to sit will let the air dissipate and the water will clear.

Why does my water have a yellow or rusty colour?

Watermain repairs, construction and other work in your area can cause some rust and sediment, which normally stick to the inside of the water main, to break away. Fire hydrant flushing can also cause this inconvenience.

The discoloured water is safe to drink, but may cause water to appear dirty. If this happens, run your bathtub tap on cold for 30 minutes until water clears and then run other cold water taps for five minutes or until clear.

Should I be concerned if my water has a chlorine taste or smell?

We add chlorine to disinfect your water and keep it free from harmful microorganisms. Some conditions, such as spring runoff, affect the quality of the water supply entering Calgary from the Bow and Elbow Rivers.

During these times, we adjust water treatment, which may include increasing the level of disinfectant, to ensure that your drinking water remains safe.

You may notice an increase in the taste and smell of chlorine in your drinking water. To remove the taste and smell of chlorine, fill a container of water and keep it in the fridge for drinking. Much of the chlorine will dissipate from the water overnight.