Illicit Discharge Detection and Elimination

The term “illicit discharge” is defined in EPA’s Phase II storm water regulations as “any discharge to a municipal separate storm sewer that is not composed entirely of storm water, except discharges pursuant to an NPDES permit and discharges resulting from fire-fighting activities.”

Illicit discharges can be categorized as either direct or indirect.



Examples of direct illicit discharges:


  • sanitary wastewater piping that is directly connected from a building to the storm sewer
  • materials (e.g., used motor oil) that have been dumped illegally into a stormdrain catch basin
  • a shop floor drain that is connected to the storm sewer
  • a cross-connection between the municipal sanitary sewer and storm sewer systems

Examples of indirect illicit discharges:


  • an old and damaged sanitary sewer line that is leaking fluids into a cracked storm sewer line
  • a failing septic system that is leaking into a cracked storm sewer line or causing surface discharge into the storm sewer

The Town of Bel Air is in the process of developing a comprehensive IDDE program beginning with the enactment of an Illicit Discharge and Connection ordinance passed by the Board of Town Commissioners on June 2, 2014.
 

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If you observe any circumstance occurring in Town that you feel may be detrimental to the environment, please do not hesitate to call the Department of Public Works at 410-638-4536.



Storm water Pollution & Illicit Discharges
What are they and How can you help?