| Business | Phone |
| Air Management Administration 1800 Washington Blvd, Baltimore 21230 | (410) 537-3255 |
| Groundwater Division 1800 Washington Blvd, Baltimore 21230 | (410) 537-3778 |
| Hazardous Waste 1800 Washington Blvd, Baltimore 21230 | (410) 537-3343 |
| Public Drinking Water 1800 Washington Blvd, Baltimore 21230 | (410) 537-3702 |
| Solid Waste Program 2500 Broening Hwy, Baltimore 21224 | (410) 631-3318 |
| Waste Minimization & Recycling 1800 Washington Blvd, Baltimore 21230 | (410) 537-3315 |
| Water Management 1800 Washington Blvd, Baltimore 21230 | (410) 537-3567 |