Keystone Hall offers a variety of residential and outpatient treatment, prevention, and recovery support services to youths, adults, and families, with a special focus on serving co-occurring mental health disorders.  Since 1983, more than 13,000 individuals have received life-saving treatment.

Outpatient Program and Services

Residential Programs

Harbor Care Health and Wellness Center

We also provide medical detox, PHP and MAT through our sister-agency, Harbor Homes/ Harbor Care Health and Wellness Center.

Client eligibility will be assessed upon a clinical evaluation and depending on capacity.

As a member of the Partnership for Successful Living, clients of Keystone Hall also have access to the programs and services offered by our affiliates.  These programs are supported through federal and state grants, foundation grants, and individual and corporate community support. To learn more or make a donation, visit our Donate page.

All treatment modalities and services adhere to the most advanced approaches to substance use treatment and recovery.  Keystone Hall partners with area hospitals, social service providers, and other health care professionals on an ongoing basis to ensure the highest standards of care.  Program guidance and design is also provided by the American Society of Addiction Medicine, the US Department of Substance Abuse and Mental Health Services Administration, and Alcohol an Other Drug Treatment Services.

Keystone Hall Eligibility Form
Keystone Hall Release of Information Form
Cynthia Day Eligibility Form


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Keystone Hall
615 Amherst Street, Nashua, NH 03063

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