How do I find drug rehabilitation centers in Denville, New Jersey?

I need to do this for a cousin of mine. She has gotten herself addicted to heroin because her peers are snorting it too. I think it was her desire to belong to a group that enticed her to try heroin. Now she regrets what she has done and want to get herself treated. I want to help her, even if only by finding a drug rehab for her.

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