The Maryland Department of Transportation State Highway Administration (MDOT SHA) controls storm drain system pollutants along MDOT SHA roads. We do the following:
In 2015 MDOT SHA received an NPDES MS4 permit (No. 11-DP-3313) from the Maryland Department of the Environment (MDE) to control storm-drain-system pollutant discharges in MS4-designated areas (see map below). The permit requires that we use restoration practices to treat 20% of existing MDOT SHA impervious surfaces and address stormwater wasteload allocations (WLAs) established under US Environmental Protection Agency (EPA)-approved Total Maximum Daily Loads (TMDL).
Other West Chesapeake Watershed Sediment TMDL Implementation Plan (PDF)Non-Tidal Back River Watershed Sediment TMDL Implementation Plan (PDF)Non-Tidal Patuxent River Lower Watershed Sediment TMDL Implementation Plan (PDF)Non-Tidal Patuxent River Middle Watershed Sediment TMDL Implementation Plan (PDF)
Review latest draft MDOT SHA TMDL implementation plan.
707 North Calvert Street
Baltimore, Maryland 21202-3601
Main Business Line – 410-545-0300
Safety Campaigns – 1-800-323-6742
For emergencies, call MDOT SHA's Statewide Operations Center at 410-582-5650.
Frequently Asked Questions
Public Information Act