Contact Us Home // Contact Us Send Us a Message Thank you for your interest in Tranquility Rehab. The best way to contact Tranquility Rehab is by phone at (510) 945-1404, or leave a message with the form below and our team will get back to you shortly. Name(Required) First Email(Required) Phone(Required)Security Question: What is 1+1?(Required) Address 25872 Five Canyons Pkwy, Castro Valley, CA 94552 Email staff@tranquilityrehab.org Phone 510-766-6625 Facebook Instagram Linkedin Pinterest