Horizon Services, Inc.
Hayward, California, 94541
Horizon Services, Inc. (HSI) is a nonprofit established in 1974 offers addiction treatment with the goal of reducing substance use related challenges for people from all walks of life, including those from some of the most disenfranchised and marginalized communities. We practice our values of Integrity, Respect, Diversity, and Quality to provide residential treatment, withdrawal management, and s