We have been designated a large municipal separate storm sewer system (MS4). Our Storm Water Manager is the single point of contact that handles agency issues related to storm water quality. For questions or comments Contact Us.
Stormwater runoff is generated primarily from rain and snowmelt events that flow over land or impervious surfaces, such as roads, parking lots, and building rooftops, and does not soak into the ground. The runoff picks up pollutants like trash, chemicals, oils, and dirt/sediment that can harm our rivers, streams, lakes, and coastal waters. To protect these resources, communities, construction companies, industries, and others like SCDOT, use stormwater controls, known as best management practices (BMPs). These BMPs filter out pollutants and/or prevent pollution by controlling it at its source.
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Our MS4 permit grants permission to discharge storm water to all receiving waters in South Carolina. Required Permits Info.
We also have a permit regulating storm water runoff from construction project sites.
NPDES Stormwater Permit (MS4 Permit)
NPDES General Permit for Storm Water Discharges from Large & Small Construction Activities
Information for Design Professionals
This manual was developed to provide information on Stormwater Quality Management.
Water Quality Design Manual
Requirements For Hydraulic Design Studies
Rainfall Intensity Values
Approved Rainfall Data
Approved Rainfall Data
NRCS Soils Info
SCDOT Welcome Centers and Rest Areas are provided as a service to the public. Stormwater runoff from these facilities is regulated through the National Pollutant Discharge Elimination System Permit.
Help Prevent Pet Waste Problems
The SC Department of Transportation (SCDOT) and PalmettoPride announce a new partnership with the statewide litter cleanup program Adopt-A-Highway. Beginning on October 15, 2012, PalmettoPride will assume management of the successful program of more than 2,500 local volunteer groups.
Notice of Intent (NOI) and Checklist
SCDOT construction projects that require an NPDES permit must have a Notice of Intent (NOI) submitted to South Carolina Department of Health and Environmental Control. A Stormwater Pollution Prevention Plan – NOI Checklist form, must be completed for each NOI submittal.
NOI Form & Instructions
If you observe something other than storm water discharged into SCDOT's storm water system, this may be an "illicit discharge" to our system.
Use these forms to report an illicit discharge