Storm Water Utility Rates

Single Family Detached Homes


Storm Water Utility rates for single family detached homes are based upon gross property area:
  • Small Parcels……..……………$9.33 per quarter - gross area less than 6,000 square feet
  • Medium Parcels………………..$12.45 per quarter - gross area between 6,000 and 18,000 square feet
  • Large Parcels..……...…………$15.57 per quarter - gross area between 18,000 and 87,120 square feet

All Other Properties


Storm Water Utility charges for all other properties are based upon the property’s impervious area as measured from aerial photography or field surveys. The charge is $4.15 per month billed quarterly per Impervious Area Unit (IAU). The number of IAUs attributed to a property is determined by dividing the total impervious area (square feet) by 2,800 and rounding the result up to the next integer.
  1. Who do I contact if I have questions about my water bill?
  2. What is the Water Service Repair Program and the Sewer Lateral Repair Program?
  3. What is the Rain Gardens for Rock Island Program?