Policy and programmatic initiatives of the last decade have focused on increased coordination of services and expansion of prompt substance abuse treatment for mothers initially involved with child welfare services (CWS). Yet, little evidence has been amassed concerning the implications of this approach on the recurrent need for CWS. Data are from a large national probability sample of children and their caregivers involved with CWS following an allegation of maltreatment. Data include the recurrence of maltreatment reports for this group of children who remain at home. Selected from 1,101 caregivers with an indicated substance abuse problem, a group of 224 clients who did not receive services were compared with 224 treated clients. Event history analyses showed that clients who received substance abuse treatment were nearly twice as likely to have another child abuse report within 18 months. Reasons why participation in substance abuse treatment may result in greater involvement with CWS are posited.