Can someone please tell me how to find treatment centers for people with dual diagnosis in Merced, California?

I'm doing a research about dual diagnosis. I figured it would be good to observe the actual people who have this kind of illness. I want to get a few interviews too and this is why I want to find treatment centers that cater to patients with dual diagnosis.

: http://alcoholdrugstreatment.info/can-someone-please-tell-me-how-to-find-treatment-centers-for-people-with-dual-diagnosis-in-merced-california-2