Is there a drug rehabilitation program offered in Sugar Hill, New Hampshire?

My dad is a drunkard and a drug addict. He left when I was twelve years old and now he has returned to ask for my help. He said he wants to change and he wants to live a better life for all of us. Now, I really don’t believe everything that he says but I think I have to give the old man a chance. The first thing I have to do is to admit him in a drug rehabilitation to undergo a program that might help him get better. We live here in Sugar Hill, New Hampshire but I have no idea if there are any drug rehabs here. Please help us. Thank you.