Although Delaware is the seventh smallest state in the country (including Washington, D.C.) in terms of population size, it has the second highest drug overdose death rate. The Delaware Division of Substance Abuse and Mental Health has increased attention in identifying disparities in treatment outcomes. We explored reasons for discharge from publicly-funded treatment in Delaware with special attention to populations at risk for health inequities, with a focus on covariates of treatment non-completion. Using secondary data collected from publicly-funded treatment providers, we analyzed data from individuals that were admitted to substance use treatment between 2015 and 2019 and had been discharged in 2019. We did this by using logistic and multinomial regression, focusing on non-completion treatment outcomes such as failure to meet requirements, loss of contact, and treatment refusal. Clients who were Black or African American, compared to white clients, were more likely to be lost contact with, administratively discharged, or marked as failing to meet treatment requirements than having a completed treatment discharge. Women were 30% less likely than men to have “failed to meet treatment requirements” compared to completing treatment. Further investigation is needed into these patterns. While treatment quality cannot be assessed using this data, the results point to a need for closer study of disparities in treatment related to race, ethnicity, gender, employment, criminal justice involvement, and type of drug used. Treatment providers should be made aware of culturally informed care, as well as client-created goals, in order to reduce disparities in exit from treatment.