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Storm Water

Storm water runoff includes rainwater and snowmelt that flows across the land from ponds, pipes, culverts, ditches, outfalls, manholes, and catch basins. 

Storm water is collected via storm drains, located at the curbs of roads, and then moved via a piping system to large mainline pipes. Eventually the storm water flows into the South Saskatchewan River. 

This storm water system is a vital part of the City's infrastructure. Managing storm water protects the health and safety of the public and the environment by avoiding flooding, erosion, and preventing pollutants from reaching our waterways.

Storm Water Utility 

Saskatoon’s Storm Water Utility funds vital storm water infrastructure and flood protection services.  In 2011, Saskatoon City Council approved changes to the Storm Water Utility rates to make them proportional to the storm water generated based on property size and type of surface.

Rate Structure & Billing

The unit of measure for Saskatoon’s Storm Water Management Charge is an Equivalent Runoff Unit (ERU), which is used by many municipalities for storm water utility billing.  One ERU represents 265.3 m2 of impervious surface such as roofs, driveways, and sidewalks.  One ERU is valued at $4.40 per month or $52.80 per year. 

Residential Properties

Single-family residential property owners pay a maximum of one ERU regardless of property size.

Multiple owners of a property (for example, a multi-owner condominium complex), are charged for the proportion of runoff associated with the area (e.g., streets, sidewalks, etc.) For example, a complex that has five ERU’s but only four water meters is charged for 5 ERUs/month divided by 4, and the monthly bill is split among the property's water service customers. 

Residential properties are billed monthly.

Commercial & Industrial Properties

Commercial and industrial properties are charged according to the number of ERUs that is assigned to their property (based on size), with a minimum charge of 2 ERUs.

To lessen the impact of the rate structure on property owners with higher ERU numbers, the new storm water utility is being phased in over seven years, with full implementation by January 1, 2018. With the cap system, bills will not exceed 100 ERUs.    

The rate cap allows for the following maximum charges:

  • 2012: 10 ERUs ($44 per month, $528 per year)     
  • 2013: 25 ERUs ($110 per month, $1320 per year)      
  • 2014: 40 ERUs ($176 per month, $2112 per year) 
  • 2015: 55 ERUs ($242 per month, $2904 per year)       
  • 2016: 70 ERUs ($308 per month, $3696 per year)       
  • 2017: 85 ERUs ($374 per month, $4488 per year)       
  • 2018: 100 ERUs ($440 per month, $5280 per year)    

Commercial and industrial property owners receive an annual bill for storm water management in mid-year. 

Reduce Your Storm Utility Rate

Commercial and industrial property owners can reduce their Storm Water Utility bill by making improvements to their properties such as private storage ponds, green roofs, permeable paving, rain gardens, or other “soft” landscaping that reduces runoff. 

Owners are ‘credited’ for the equivalent amount of runoff that would be diverted during a storm event, due to the improvement. In addition to decreasing the amount of storm water that collects on properties, many of these improvements also provide environmental benefits.

Property owners may request a recalculation of their ERU value by contacting  An investigation is then conducted by an engineering technician to ensure the estimated amount is accurate.  Credit will be given for improvements the property owner makes to decrease the hard surface area.