How is the stormwater fee calculated overall?

The financial obligations of the Regional Stormwater Management Program, which includes not only the regulatory compliance portion but also the stormwater infrastructure needs within the Boroughs, are significant.  The annual/monthly fee was determined by evaluating the budgetary needs of each Borough and evaluating the number of IAUs in each community.

A tier structure was established to group like properties into five different Tiers based on the impervious area of a parcel (2,480 square feet of impervious area representing 1.0 Impervious Area Unit).  Each Tier has a specific range of impervious area and an associated IAU or billing unit.  Tiers 1 through Tier 4 capture the majority of parcels.  Tier 5 includes parcels with 6,000 square feet or more of impervious area