National Institute on Drug Abuse (NIDA) 

https://www.drugabuse.gov

 

 

National Institute on Alcohol Abuse and Alcoholism (NIAAA)

https://www.niaaa.nih.gov/

https://alcoholtreatment.niaaa.nih.gov/

 

Substance Abuse and Mental Health Services Administration (SAMHSA)

https://www.samhsa.gov/

https://findtreatment.samhsa.gov/