Water outages and main breaks

We know you rely on us to provide reliable access to clean and safe water. When outages happen, we work to notify you and restore service as quickly as possible.

Under normal circumstances, water main breaks are repaired, and water is back on within 48 hours. We prioritize breaks based on factors such as the risk of property damage, impact to critical facilities (like hospitals or schools) and the number of customers out of water.

The time it takes to fix a break varies due to several factors including digging in frozen ground, frost depth, how quickly the break can be located, the size of the break and the current weather conditions. 

Call 311 when:

  • Your water is not on, and you have not been notified of an outage.
  • You see water coming up through or pooling in the grass, road or sidewalk.

Current main breaks and water outages

Note: Our priority is to repair a break and restore water service. Outages are added to this list and information updated as crews are able. Please call 311 to report or if you have concerns about a water outage. 

Frequently Asked Questions

Why wasn’t I notified that my water would be off?

Not all water outages are planned. Water main breaks are unpredictable and can happen for a variety of reasons:

  • The age, material, and condition of the pipes
  • Condition of the soil
  • Temperature of the ground and water
  • Pressure changes

How can I get water while the main is being repaired?

The most common solution is a water wagon - a portable tank of drinking water that provides emergency supply to you and your neighbours. It is placed in a central location to provide customer access to water during longer outages. 

We will provide a shower pass for use at a local City-run recreation centre to affected customers if we are unable to restore their water service within 24 hours.

For shorter outages, and to support you while water wagons or temporary supplies are set up, we recommend keeping a small emergency supply of water on hand. You can continue to use the toilet during interruptions by pouring stored water into your toilet bowl to empty its contents. 

Learn more about preparing your 72-hour emergency preparedness kit.

What should I do once my water is turned back on?

We test for quality before water is restored. If your water is discoloured, it is still safe to drink. To ensure the issue is resolved:

  • Run your bathtub tap on cold for 30 minutes until water clears. Then run other cold water taps for five minutes or until clear.
  • Wash tap aerators or screens in hot, soapy water, and disinfect them for 10 minutes in a solution of one part bleach to nine parts water.
  • Disinfect water filters to manufacturer's recommendations. 

If water does not clear after running the taps, please contact 311.

When will the road be repaired?

Once the water main repair is complete and Water Services has completed filling in the excavation, crews will work to pave the area with asphalt.

  • Depending on the circumstances, a temporary repair to the road or sidewalk may need to be replaced in the spring and once the frost has thawed. 
  • Please obey all traffic barriers and slow down when our crews are working.

Does a main break mean there is a problem with our water delivery system?

No, water main breaks happen. We maintain nearly 15,000 kilometres of underground water infrastructure as part of our drinking water, wastewater and stormwater systems and have one of the lowest number of average breaks per 100 kilometres when compared to other major Canadian cities.

How does temperature impact water mains?

The longer the temperature stays below freezing, the deeper the frost goes, putting pressure on water main and service pipes. Winter frost depths in Calgary typically range from two to three metres. Frozen ground increases the amount of time required to access the water pipes, resulting in a longer time frame to restore water. Pipes are buried around three to four metres deep.

How is a water main repaired?

  1. A crew is dispatched to determine the location, impact and severity of the break
  2. Crews reduce and shutoff water flow by closing nearby water valves
  3. Crews identify alternative sources for temporary customer water
  4. Crews excavate and repair the watermain
  5. Service is restored after the pipe is flushed and water quality is tested
  6. The road, lane, sidewalk or lawn is repaired. This may take time depending on the season, weather, difficulty of the location and size of the break. If there are damages from the water main repair, we will arrange for rehabilitation or repair. Learn more at Water Service Construction Property Rehab.
What Causes Water Main breaks?
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