Notwithstanding any other provision of law, the purpose of the provisions of this chapter relating to dependent children is to provide maximum safety and protection for children who are currently being physically, sexually, or emotionally abused, being neglected, or being exploited, and to ensure the safety, protection, and physical and emotional well-being of children who are at risk of that harm. This safety, protection, and physical and emotional well-being may include provision of a full array of social and health services to help the child and family and to prevent reabuse of children. The focus shall be on the preservation of the family as well as the safety, protection, and physical and emotional well-being of the child. The provision of a home environment free from the negative effects of substance abuse is a necessary condition for the safety, protection and physical and emotional well-being of the child. Successful participation in a treatment program for substance abuse may be considered in evaluating the home environment. In addition, the provisions of this chapter ensuring the confidentiality of proceedings and records are intended to protect the privacy rights of the child.