Working with federal authorities and cybersecurity experts, the City of Columbus continues its investigation and response to a July cybersecurity incident.
The Stormwater Drainage Manual establishes stormwater control requirements for all new public and private development and redevelopment in the City of Columbus. It requires post construction stormwater controls for both water quality and water quantity. For questions, please contact DPU Private Development@columbus.gov.
The 2024 Manual shall be used for designs submitted after July 30, 2024. Note: SCP = Stormwater Control Practice.
NPDES Permit(PDF, 901KB)
NPDES Annual Reports:
Three types of variances from the Stormwater Drainage Manual are possible. Learn about the application process, join a list to receive notice when requests are submitted, or view the list of submitted requests. NOTE: An updated SWDM Guidance Document is forthcoming. Please contact Greg Fedner at 614-645-8072 or by email at gfedner@columbus.gov for questions related to this document and other SWDM variance issues.
Stormwater Variance Requests
The City's Stormwater Drainage Manual requires developers to establish Stream Corridor Protection Zones (SCPZ) when new development or redevelopment is proposed on property where streams are located. SCPZs consist of the stream and the riparian area along it and are protected through either deed and plat restrictions, easements or by City ownership. The purpose of the SCPZ is to allow the natural, lateral movement of open water courses, provide sufficient area for flood conveyance, protect water quality and prevent structures from being impacted by natural streambank erosion.
Stream Corridor Protection Zones