Over 20,000 parcels that contribute stormwater runoff but aren’t being charged will be added to DWSD’s billing system this October.
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Every year, billions of gallons of contaminated stormwater runoff and snowmelt pour off roofs, sidewalks, parking lots and other impervious surfaces into Detroit’s combined sewer system, then perhaps to a retention-treatment basin (RTB) and eventually to the wastewater treatment plant. The Detroit Water and Sewerage Department (DWSD), Detroit’s retail water agency for the Great Lakes Water Authority (GLWA), says this runoff costs more than $125 million annually.
Federal and state regulators required DWSD to spend more than $1 billion in combined sewer overflow storage facilities (RTBs) to reduce polluted overflows into natural waterways like the Detroit River. The drainage charge to property owners offsets this investment and the drainage treatment costs.
Most DWSD customers have been paying for drainage as part of their water and sewer bills. The City Assessor’s Office and DWSD are working to ensure that all parcels are billed for their share of drainage costs.
DWSD intends to begin a green infrastructure credit program in October. Customers who reduce runoff can earn credits to be applied to their bill. Fair, accurate billing and green infrastructure practices will benefit the city and its residents.
DWSD provides a Parcel Viewer on which to search for parcel information by address. Impervious surface area is used to calculate drainage charges. DWSD says it has data from the City Assessor's Office and flyover images to determine impervious surfaces. Property owners who disagree with the data can complete a drainage survey form.
Over 20,000 parcels that contribute stormwater runoff but aren’t being charged will be added to DWSD’s billing system this October. Customers who need to update parcel information or ask questions should contact DWSD. A Customer Steering Committee meeting has been scheduled for July 14, 2016.http://www.detroitmi.gov/drainage