| ADAPT Halton, Oakville - Head Office, Alcohol, Drug and Gambling Assessment, Prevention and Treatment Services | Oakville |
| Canadian Mental Health Association, Halton Region Branch Head Office - Oakville, Mental Health Services | Oakville |
| ConnexOntario, Helpline | Not Known |
| Halton & Mississauga RAAM Clinic, Oakville - Head Office, Addiction Medicine Clinic | Oakville |
| Halton & Mississauga RAAM Clinic, Acton, Addiction Medicine Clinic | Acton |
| Halton & Mississauga RAAM Clinic, Burlington, Addiction Medicine Clinic | Burlington |
| Halton & Mississauga RAAM Clinic, Georgetown, Addiction Medicine Clinic | Georgetown |
| Halton & Mississauga RAAM Clinic, Milton, Addiction Medicine Clinic | Milton |
| Halton & Mississauga RAAM Clinic, Oakville - 1525 Cornwall Rd, Addiction Medicine Clinic | Oakville |
| Halton & Mississauga RAAM Clinic, Oakville - Kerr St, Addiction Medicine Clinic | Oakville |
| Halton Healthcare, Mississauga Halton Central Intake Program - one-Link - Addictions and Mental Health Services Referral | Oakville |
| Halton Healthcare, Oakville Trafalgar Memorial Hospital, Mental Health - Integrated Addiction Medicine Clinic | Oakville |
| Halton. Halton Region Public Health, Exchange Works - Needle Exchange and Naloxone Distribution | Halton Region |
| Halton. Halton Region Public Health, Sexual Health Clinics | Halton Region |
| Hope Place Centres, Men's Residential Addiction Treatment | Hornby |
| Hope Place Centres, Community Based Addiction Treatment | Halton Hills |
| Hope Place Centres, Women's Residential Addiction Treatment | Halton Hills |
| Horizons Opioid Treatment Service, Methadone and Suboxone Clinic | Burlington |
| Milton Life Care, Addiction Services | Milton |
| Narcotics Anonymous | Halton Region |
| Oak Park Neighbourhood Centre, Churchill Neighbourhood Centre | Oakville |
| Ontario Addiction Treatment Centres, Methadone Maintenance Treatment | Oakville |
| Support House, Community Health Centre Mobile Health Team | Oakville |
| Wellbeings Pain Management and Dependency Clinic | Burlington |
