Charles County, Maryland

NPDES Municipal Separate Storm Sewer System (MS4) Permit

NPDES Municipal Separate Storm Sewer System (MS4) Permit

Stormwater runoff is rainfall or melting snow that flows over the land or through pipes, and stormwater management facilities into streams, rivers, wetlands, and estuaries. Stormwater runoff contains pollutants such as landscaping fertilizer, heavy metals and oil from vehicles, fecal coliform from pet waste, and sediment from eroding land.  Untreated stormwater discharged into waterways often creates unlivable conditions for fish and other aquatic life, loss of aesthetics, and human health issues.

Because polluted stormwater is a national concern, in 1972 Congress mandated amendments to the Federal Clean Water Act requiring the implementation of controls designed to prevent harmful pollutants from being washed by storm water runoff into local water bodies. The amendments require certain jurisdictions to obtain NPDES Municipal Separate Storm Sewer System permits. Visit the Environmental Protection Agency and Maryland’s NPDES Municipal Stormwater Permits for more information. 

Summary of the 2014 NPDES MS4 Annual Report

In 2014, Charles County continued watershed restoration efforts to provide management of stormwater runoff from impervious area in the Development District.  The Acton Lane, Fox Run and Ryon Woods restoration projects were completed, and now provide stormwater management for 19 acres of impervious surface.  These projects are anticipated to improve water quality and aquatic habitat in receiving streams.  Expanding the computer mapping of stormwater infrastructure continued, which will ultimately enhance the ability to manage the storm sewer system.  

Details of these efforts and additional efforts are included in the 2014 NPDES MS4 Annual Report.  For copies of the report appendices please contact the Planning Division at 301-645-0540 or by e-mailing Planning@CharlesCountyMD.gov.

IMPORTANT PLEASE NOTE:  All publications located within the Planning and Growth Management section of the web site are believed to be accurate as of their posting date. However, they may not be accurate on the day you view them. To verify whether these documents are the most current official document, please contact the division associated with the document in question.