Association members are still getting used to the effects of the Philadelphia Water Department’s (PWD) new billing methods for storm water runoff, and ensuing rate hikes for many. PWD now charges for storm water management as it relates to a property’s burden on the sewer system. They use the property’s individual characteristics as the basis for the fee. Geographic Information Systems technology (high tech mapping software) is employed to measure a property’s gross area and its impervious area. Impervious area is any surface that prevents water from soaking into the ground, such as parking lots. Once they know the gross and impervious areas, they calculate the storm water charge:
Storm water Charge + (Gross Area Rate x Gross Area of Property) + (Impervious Area Rate x Impervious Area of Property)
We’ll continue monitoring members’ experiences with this.