The Cost of Compliance
Environmental Protection Agency Chesapeake Bay Program Total Maximum Dail Load
The U.S. Environmental Protection Agency established the Chesapeake Bay Total Maximum Daily Load (TMDL)
in 2010. The Program, also know as the "Bay Pollution Diet" is a comprehensive plan for Chesapeake Bay Watershed states with rigorous accountability measures to restore clean water in the Bay and the region’s streams, creeks and river. The Bay TMDL is designed to ensure that all pollutant control measures needed to fully restore the Bay and its tidal rivers are in place by 2025, with practices in place by 2017 to meet 60 percent of the necessary pollution reductions.
According to the EPA, the framework for accountability is the Watershed Implementation Plans (WIP) developed by counties and municipalities. WIP documents serve as roadmaps for how and when a jurisdiction plans to meet the required pollutant allocations under the Bay TMDL. The table below shows the projects provides the County's WIP
identified projects for stormwater management and the associated yearly and total cost.
WIP Identified Projects
|Total Costs (2025)|
|Stream & Wetland Restoration||$27,910,000||$334,954,000|
|Stormwater Pond Retrofits||$ 6,880,000||$334,954,000|
|Stormwater Outfall Rehab||$32,210,000||$386,533,000|
|Other Related Projects||$ 3,280,000||$ 39,360,000|
|Stormwater Infrastructure Maint||$ 6,970,000||$ 51,400,000|
NPDES MS4 Permit
In November 1990, the United States Environmental Protection Agency issued final regulations requiring National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permits. The Maryland Department of Environment administers the federal permit requirements intended to reduce and eliminate pollution from rainfall runoff, which flows through storm drain systems to local streams, ponds, and other waterways.
In 1993, Anne Arundel County became one of the first jurisdictions to receive a Phase I NPDES MS4 permit. The Department of Public Works is the lead agency tasked with ensuring compliance with permit conditions.
The table below details the estimated annual cost incurred by the County to comply with the NPDES MS4 permit.
NPDES MS4 Permit Obligation
Pollutant Source Identification
Stormwater Management Program
Erosion and Sediment Control Program
Illicit Discharge Detection and Elimination Program
Trash and Litter Program
Property Management and Maintenance Program
Public Education and Outreach
Watershed Restoration Plans & Total Maximum Daily Loads
Assessment of Controls
Annual Progress Report
Total Estimated Cost to Comply with MS4 Permit
Additional administrative and debt service
Annual estimate operating revenue required
To view yearly NPDES MS4 Permit reports and learn more about the County's successful efforts to implement MS4 Permit requirements, visit the Department of Public Works Watershed Ecosystems and Restoration Services NPDES MS4 Permit page