Calgary – Watering Schedule

(originally shared by CPCIA)

City of Calgary presented updates on the Preferred Watering Days initiative and Water Managed Sites Program. These proactive measures aim to help manage the City's water system load while critical infrastructure repairs and upgrades continue.

While essential repairs to the feeder main have been completed, the City is not yet operating the line at full capacity. Until major infrastructure projects are finalized, there remains an increased risk that Stage 1 Outdoor Water Restrictions could be called if water demand exceeds system capacity.

As we enter the spring and summer seasons — our busiest period for irrigation — it’s vital that our industry leads by example. By working together, we can help reduce system strain and minimize the likelihood of formal restrictions being imposed. 

Why Water Conservation Matters Now, Reducing watering especially important when:

  • Water treatment or distribution infrastructure is under repair or upgrade;
  • Hot weather drives high demand that strains water treatment capacity;
  • River levels are lower than normal due to drought;
  • River water quality fluctuates.

Action Requested: Adopt Preferred Watering Days

To assist the City and protect the health of our landscapes, all irrigation professionals are asked to configure systems to follow the City’s Preferred Watering Days.

This is not a bylaw change — it is a voluntary industry effort to help balance demand and protect our ability to operate without restrictions.

Preferred Watering Days:

  • Odd-Numbered Addresses: Wednesday, Friday, Sunday
  • Even-Numbered Addresses: Tuesday, Thursday, Saturday

By adjusting irrigation schedules accordingly during spring system start-ups, we can help the City's reservoirs replenish adequately during periods of peak use.

About Water Managed Sites (WMS)

A Water Managed Site (WMS) designation certifies that an irrigation system can adjust watering based on actual site needs — either by weather conditions or soil moisture levels — to maintain landscape health efficiently.

Certified WMS sites are permitted greater flexibility under Stage 1 Outdoor Water Restrictions (Schedule E).

Becoming a WMS ensures:

  • Healthier landscapes during periods of water shortage.
  • Protection of client properties.
  • Continued leadership by our industry in responsible water use.

For more information about Water Managed Site certification, please visit: Water Managed Sites

Calgary: Clarification on Stage 4 Water Restrictions

We've been hearing from some members about ongoing concerns with the current water restrictions in place in Calgary.  Today we reached out to clarify the Stage 4 restrictions when it comes to plant materials.
Please see the information below.  While this situation in unique in regards to the conditions under which stage 4 was implemented it is also eye opening to what future summers may look like.  There will be time once service is restored to engage the City with our input and suggestions.

-----------------

We are currently using the Outdoor Water Use Restrictions outlined in Schedule E of the Water Utility Bylaw which is our only tool to enforce water use reductions.

All citizens and businesses, including car washes have been asked to reduce their indoor water use but these actions are voluntary.

As you have referenced "Watering plants, shrubs and trees for commercial sale" is an activity that is allowed during Stage 4 restrictions. However, the adjacent column indicates that this applies to "Nurseries, garden centers, turf tree farms and market gardens and community gardens". Therefore, this is to be interpreted as trees/plants which are not yet planted in their final location can be watered with potable water provided by Calgary Water Services. If a tree/plants have been installed in its new home, it is considered sold. A financial transaction need not have taken place.

Further, Schedule E indicates that "Watering of New Grass Plantings (sod or seed) with reasonable evidence of recent installation: sod within 21 days seed within 45 days" is allowed in Stages 1-3, but NOT during Stage 4. This is due to the severity of any situation leading to Stage 4 restrictions.

All contractors requiring water to continue doing their jobs (eg. watering newly installed plants/trees) have been asked to source water outside of Calgary's water service area. Bulk stations in Calgary, Airdrie, Chestermere and Strathmore receive Calgary's potable supply and SHOULD NOT be used. All other bulk stations in the region can be used to fill trucks.

Non-potable water is another option for irrigating newly installed plants.
------------
We hope this helps clarify the situation and provides some information in your communication with staff and customers.