On this page:

1. Stormwater user-fee
2. Stormwater credits
3. Stormwater frequently asked questions

Stormwater user-fee

We fund your stormwater management through a stormwater user-fee funding model.

The average single dwelling homeowner user-fee is about $16.39 per month. 

The stormwater user-fee appears on your monthly utility bill. Please refer to the rate table below to see the rate applicable to your property. 

Stormwater rates table

The following table shows our current stormwater rate schedule, effective January 1, 2021:

Stormwater Classification Code                               Basis for Charge2021 Monthly Charge

Residential Single Detached



Detached homes with building footprint* size of 105 m2 or less



Residential Single Detached



Detached homes with building footprint* between 106-236 m2



Residential Single Detached



Detached homes with building footprint* size of 237 m2 or more






Per dwelling unit



Residential Condominium           

Per dwelling unit


Multi-Residential duplex             

Per building


Multi-Residential triplex

Per building


Multi-Residential four-plex        

Per building


Multi-Residential five-plex

Per building


Multi-Residential (>5 units)

Per property (according to number of dwelling units)


Non-Residential Smallest            

26 - 1,051 m2 of impervious area


Non-Residential Small                   

1,052 - 1,640 m2 of impervious area


Non-Residential Medium-Low  

1,641 - 7,676 m2 of impervious area


Non-Residential Medium-High

7,677 - 16,324 m2 of impervious area


Non-Residential Large                  

16,325 - 39,034 m2 of impervious area


Non-Residential Largest

39,035 m2 or greater of impervious area


 How your user-fee is calculated
Your stormwater user-fee applies funds directly to stormwater management.

A series of rate tiers are calculated based on:

  • property type and size of impervious area
  • varying degrees of water runoff generated from the property

Properties with a high percentage of impervious areas, like buildings, driveways and parking lots typically create a lot of runoff because these surfaces do not allow water to absorb into the earth.

 Impervious areas
  • rooftops
  • driveways
  • parking areas
  • patios
  • garages
  • other hard surfaces that block the entry of rainwater into the ground

For more information on stormwater management, the stormwater funding model, or stormwater rates, call us by phone at 519-741-2200 ext. 7355.

Stormwater credits

View our stormwater credit policy information and our Market Incentive Program- coming soon.

Stormwater frequently asked questions

Read our stormwater frequently asked questions.

Contact Us