Is There Someone Here Who Can Tell Me How to Find Drug Rehabs in Gridley, California?

I have a friend whom I haven’t had contact with in years. Recently, though, someone told me that he was spotted at a drug rehab in Gridley, probably working there as a counselor. Since I will be visiting someone else in California, I think I might as well go and see my friend too. This is why I want to find the available drug rehabs there.