How do you determine the assessment for the Stormwater Fee?

The basis of the stormwater fee is the square feet of impervious surface area on each property.  Impervious area (IA) is a surface that prevents infiltration of water into the ground and includes but is not limited to roofs, patios, garages, driveways, storage sheds, and similar structures.  Stormwater utilities across Pennsylvania have utilized this methodology as a fair, equitable, and uniform mean of assessing user fees since it is a quantifiable indicator of the area of a property from which stormwater runoff originates and impacts the stormwater infrastructure system.