| Business | Phone |
| Water Division 2045 Morse Rd, Columbus 43229 | (614) 265-6717 |
| Surface Water 122 S Front St, Columbus 43215 | (614) 644-2001 |
| Solid & Infectious Waste Mgmt 122 S Front St # 5a, Columbus 43215 | (614) 644-2621 |
| Environmental Protection Agcy 122 S Front St, Columbus 43215 | (614) 644-3020 |
| Environmental Protection Agcy 3232 Alum Creek Dr, Columbus 43207 | (614) 728-3778 |
| Environmental Review Appeals 309 S 4th St # 222, Columbus 43215 | (614) 466-8950 |
| Ohio Air Quality Dev Authority 50 W Broad St # 1718, Columbus 43215 | (614) 224-3383 |
| Ohio Water Development Auth 480 S High St, Columbus 43215 | (614) 466-5822 |
| Groundwater Division 122 S Front St # 6, Columbus 43215 | (614) 644-2752 |
| Hazardous Waste Facility 122 S Front St, Columbus 43215 | (614) 644-2742 |
| Hazardous Waste Management 122 S Front St, Columbus 43215 | (614) 644-2917 |
| Litter Prevention & Recycling 2045 Morse Rd, Columbus 43229 | (614) 265-6333 |