All single-family customers pay a flat fee based on the current monthly rate. The current monthly rate is listed on the bill. Multi-family units are charged the current monthly rate per ERU. An Equivalent Residential Unit (ERU) is equal to the average impervious area determined from an evaluation of all the residential parcels within the City. For Chesapeake, 1 ERU equals 2,112 square feet.
Commercial and industrial customers' stormwater bills are calculated as follows:
Total annual fee = the (total impervious area) ÷ the base ERU (2,112 square feet) × (current approved rate/ERU/month) × (12 months)
The stormwater fee rate is reviewed and approved annually by City Council.