All non-residential properties will be billed at a rate based on their measured impervious area. To determine the monthly fee, divide the total impervious area of your property by 3,650 square feet (or one Single Family Unit) to obtain the number of SFUs and multiply by the base single family rate (currently estimated at approximately $5 per month per SFU). Impervious areas were determined by analyzing aerial photographs to identify the amount of impervious surface on each property. For the majority of properties, the City’s fee will be billed on the Gallatin Public Utilities bill. However, in some circumstances, alternative billing methods may be used.