I want to know how to find alcohol rehabilitation centers in Katonah, New York. Can anyone tell me?

My boyfriend is an alcoholic. He started drinking when we broke up before. Now that we’re back together again, I want to get him back to how he was before we broke up. He’s really changed now. He’s more violent, and his alcoholism is getting in the way of our relationship. I really want to find alcohol rehabs for him.