Storm Water Charge

Credits and Fee Adjustments Appeals

The City of Wilmington’s Storm Water and Combined Sewer Overflow (CSO) management program is intended to minimize flooding of City streets and private property and reduce polution of City water ways from stormwater discharges.

All properties in the City pay a storm water charge depending on a parcel’s impervious area. The charge appears on the water/sewer bill. Any customer who believes that their bill is inaccurate can appeal for a fee adjustment. A fee adjustment will be made if it is determined that the property has been assigned to the wrong parcel class, the gross parcel area is incorrect or if the impervious area used in the computation is incorrect. Owners of non-residential properties can also apply for credits if they have installed stormwater management sytems on their property.

Please read the Storm Water Credits and Fee Adjustments Appeals Manual.

It provides complete details on the policies and procedures relating to storm water credits and fee adjustments.

Send the completed applications, supporting documentation, and the corresponding application fee to:

The Commissioner
Department of Public Works
Louis L. Redding City/County Building
800 N. French Street, 6th Floor
Wilmington, DE 19801

The Department of Public Works will review each application and send a written disposition (Form D) to the applicant.

For customer assistance regarding storm water utility billing, please call the Department of Public Works at (302) 576-3060.

City Code Section 45-53: Article II. Sewers, Sanitary and Storm Water Rates and Charges*

Contact Public Works

Mailing Address

Department of Public Works
Louis L. Redding City/County Building
800 N. French Street, 6th Floor
Wilmington DE 19801

Phone: (302) 576-3060

Public Works Call Center

Phone: (302) 576-3878

Operators are on duty 6:00 a.m. - 4:30 p.m. Monday through Friday.


Report non-emergency requests for service online 24 hours a day, 7 days a week

Water Emergencies

Phone: (302) 571-4150

Report water-related emergencies after hours (4:30 p.m. - 6:00 a.m. Monday through Friday; 24 hours a day Saturday and Sunday).


This link takes you to an external website. Combined Sewer Overflows website