To Report environmental complaints, please contact both MDE and Baltimore City as follows:

• ​For MDE:
• Odor complaints should be reported by phone to the air complaint line at (410) 537-3215 or by email to [email protected].
• Other Back River wastewater treatment plant complaints should be reported by calling (866) 633-4686.

• For Baltimore City:
  
• Call the 311 line - Submit a 3-1-1 Service Request. 311 connects Baltimore residents, businesses and​​; visitors by providing a resource of city services. You can speak with a live agent, visit the 311 web site HERE​, or use the 311 mobile app.​