(A) For the purposes stated in § 53.02 and subsequent, there is hereby assessed a stormwater service charge to each user situated with the corporate limits of the city who contributes directly or indirectly to the stormwater system of the city, in an amount as determined below.
(B) For any such property, lot, parcel of land, building or premises which contributes directly or indirectly to the stormwater system of the city, such charge shall be based upon the quantity of impervious area situated thereon.
(C) All properties having impervious area within the city will be assigned a number of equivalent residential units (ERUs), with all properties having impervious surface being assigned at least one ERU.
(1) Residential properties. A monthly charge for stormwater service rendered to residential properties shall be charged to each account within the city limits according to the service address. All residential properties are hereby assigned one ERU. This fee shall apply to all residential properties as defined herein. Residential properties may apply for credits as outlined at §53.60. Based on the granting of a credit, a residential property may pay for less than one ERU. However, in no case shall a residential property pay for less than 35% of the gross stormwater bill owed before credits were applied.
(2) Non-residential properties. Non-residential properties will be assigned a number of ERUs based upon the property's individually measured impervious area (in square feet) divided by 2,500 square feet (one ERU). The division will be calculated to the first decimal place.
(3) For the purposes of quantifying the discharge of non-polluted groundwater into the stormwater management system via sump pumps, geothermal heating and cooling systems or similar devices, one equivalent residential unit (ERU) shall be equal to 7,667 gallons per month.
(4) Only whole ERUs shall be used in determining the assignment of gross ERUs to a property. All rounding necessary to reach the appropriate whole ERU shall be done according to mathematical convention (0 - 0.4 rounded down to nearest whole ERU; 0.5 - 0.9 rounded up to nearest whole ERU).
(D) There shall be no exceptions or exemptions from the assignment of gross stormwater ERUs.
(Ord. G-11-07, passed 4-10-07; Am. Ord. G-5-17, passed 3-28-17)