Treatment for co-occurring substance use plus either serious mental health illness in adults/serious emotional disturbance in children; Does not treat alcohol use disorder; Does not treat opioid use disorders; Medication for mental disorders; Nicotine replacement; Private non-profit organization; Comprehensive mental health assessment; Outreach to persons in the community; Screening for tobacco use; Screening for substance use; Screening for mental disorders; Aftercare/continuing care; Discharge Planning; Substance use disorder education; Smoking/vaping/tobacco cessation counseling; Individual counseling; Group counseling; Family counseling; Marital/couples counseling; Smoking not permitted; Vaping not permitted; Domestic violence services, including family or partner; Mental health services; Social skills development; Suicide prevention services