Mountainside Factsheet

COMPANY NAME: Mountainside

WHAT WE DO: Substance Abuse Treatment




  1. Founded in 1998
  2. Over 17,000 lives changed
  3. 98% client satisfaction score
  4. 2 third-party accreditations from CARF International and The Joint Commission
  5. 3.7 level of care certification from the American Society of Addiction Medicine
  6. 365-day approach to treatment and care based on our historical alumni outcomes data
  7. 24/7 Recovery Support Line
  8. Highly individualized treatment with a 1:6 clinician-to-client ratio
  9. Over 50 clinical and wellness offerings
  10. 200-acre flagship campus in Canaan, CT


At Mountainside, our team abides by a “loved one standard of care,” treating our clients as if they were our most cherished loved ones. Through this philosophy, we aim to raise the standard in addiction treatment and provide an unsurpassed treatment experience for our clients.



Mountainside Canaan (Main Campus) – 187 South Canaan Road, Canaan, CT 06018

Mountainside Wilton – 372 Danbury Road, Wilton, CT 06897

Mountainside Chappaqua – 480 N. Bedford Road, Chappaqua, NY 10514

Mountainside Huntington – 141 E. Main Street, Huntington, NY 11743

Mountainside Chelsea – 243 W. 18th Street, New York, NY 10011

DetoxMedical and Psychiatric Services
ResidentialMedication-Assisted Treatment
Outpatient ServicesClinical
Extended CareWellness
Recovery CoachingFamily Wellness
Family Recovery CoachingContinuing Care
Adolescent Services Alumni Services


800 500 0399

187 South Canaan Road, Canaan, CT 06018