| Business | Phone |
| Aero Eh & S Inc 10310 Baltimore National Pike, Ellicott City 21042 | (410) 480-3636 |
| Beneficial Soil Solutions Inc 12170 Mount Albert Rd, Ellicott City 21042 | (410) 531-3205 |
| Center For Watershed 8390 Main St, Ellicott City 21043 | (410) 461-8323 |
| Chesapeake Audubon Society Ellicott City 21043 | (410) 203-1819 |
| Clean Earth Inc Ellicott City 21042 | (410) 750-1900 |
| Eco Dynamics Corp 8318 Forrest St, Ellicott City 21043 | (410) 750-3190 |
| Exploration Research Inc 8318 Forrest St, Ellicott City 21043 | (410) 750-1150 |
| Robert Sheesley & Assoc 8354 Chestnut Farm Ln, Ellicott City 21043 | (410) 750-9925 |
| Wildman Environmental Svc Inc 4747 Bonnie Branch Rd, Ellicott City 21043 | (410) 869-9999 |