SWU Fee Structure

The Stormwater Utility generates its revenue through user fees. The stormwater fee is necessary to meet the EPA and the WDNR Phase II Stormwater requirements. These fees are used for planning, development, and maintenance of the system. A separate fee was determined to be the most equitable to all citizens and companies in the City.

Residential, Commercial, and Non-Single Family Monthly Stormwater Utility Charges

Impervious (variable) Fee: $5.90 per Equivalent Runoff Unit (ERU).
Each parcel is billed individually. Owners of multiple parcels may request to receive a summary invoice for all parcels.
    • The minimum fee billed is 1 ERU or $5.90 per month ($17.70 for 3 months).
    • Larger properties over 2933 square feet are billed based on the total number of ERUs at a rate of $5.90 per ERU per month.
    • This fee covers the cost of the programs required by our stormwater permit in addition to the administration of the program and billing.

Invoices for the Stormwater Utility are sent out on a quarterly basis:
  • The January billing is for the prior 3 month period of October 1st – December 31st.
  • The April billing is for the prior 3 month period of January 1st – March 31st.
  • The July billing is for the prior 3 month period of April 1st - June 30th.
  • The October billing is for the prior 3 month period of July 1st - September 30th.
The ERU value was calculated by averaging the impervious surfaces of a single-family residential of property in Superior. The measurements included the footprint of the home plus sidewalks, driveways, garages and any other buildings.

1 ERU = 2933 square feet = the average impervious surface of a single family home.