How will I find a treatment center for dual diagnosis in Barnwell, South Carolina?

My brother has dual diagnosis. I heard my mom talk to my dad about this. They haven't told me anything yet, so I'm not even supposed to know, but I just can't help but wonder what I can do to help. I figured a little research about treatment centers would be appreciated by my parents.

: http://alcoholdrugstreatment.info/how-will-i-find-a-treatment-center-for-dual-diagnosis-in-barnwell-south-carolina-2