Impervious area is defined as a surface that is resistant to infiltration by water. Several examples of impervious area include asphalt or concrete pavement, parking lots, driveways, sidewalks and buildings. Based on a study of Arlington residential property, the average square feet of impervious surface is 2800, referred to as an Equivalent Residential Unit (ERU). The monthly fee adopted by the City Council bills per ERU.  Under the current fee structure, every property owner pays the same unit rate based on the amount of impervious area on the property.

On September 12, 2023, the City Council approved an increase of the stormwater utility fee to $9.00 per ERU starting on October 1, 2023.

Residential Property

Residential parcels include any benefited property platted, zoned or used for residential development including single family, duplex, triplex, quadraplex, townhomes, manufactured homes or other improved parcel upon which buildings contain less than five dwelling units. Residential parcels will be billed based on one ERU at the scheduled rate, for the number of dwelling units.

Commercial Property

Non-residential parcels include all benefited property that is not defined as residential by the stormwater utility ordinance, including commercial, industrial, institutional, multi-family and governmental property. The monthly fee for non-residential parcels is determined by dividing impervious area square footage by 2800 square feet and multiplying by the current rate - the result shall be a minimum of 1 ERU for each non-residential account.

Other Stormwater Fee Information

  • Failure to pay storm water fees promptly when due shall subject users to discontinuance of any utility services provided by the City.
  • Apartments are considered non-residential for the purpose of the calculation of the stormwater fee.
  • Any non-residential property on which mitigation measures have been taken may be eligible for a credit to the storm water fee. Click here to access the Mitigation form
  • The Director of the Public Works Department shall adjust the fee for such properties according to the actual mitigative effect of the measures taken.

For more information concerning the Stormwater Utility Fee contact the Public Works Department's Stormwater Management Division at 817-459-6550.