The utility shall measure the impervious ground cover of each parcel of developed real property within the boundaries of the utility to determine the number of equivalent residential units contained therein; two thousand five hundred (2,500) square feet, or less, of impervious ground cover shall equal one equivalent residential unit. All detached single-family residences and mobile homes are deemed to contain one equivalent residential unit. For all other developed real properties within the utility boundaries, the utility shall determine the number of equivalent residential units contained thereon by dividing the number of square feet of impervious ground cover on each property by two thousand five hundred (2,500); the total thus obtained will be rounded to the nearest whole number representing the equivalent residential unit. (Ord. 697, 8-14-1997)