This Metropolitan St. Louis Sewer District (MSD) Minority and Woman Business Enterprise (MWBE) Update Disparity Study is MSD’s second-generation disparity study. The first disparity study, which measured the utilization of available MWBEs on MSD’s building construction, nonbuilding construction, engineering professional services, non-engineering professional services, and goods and contractual services, was completed in 2012. The study documented a disparity in the award of prime contracts and subcontracts to available MWBEs. To address the documented disparity, the MSD Board of Trustees adopted an MWBE program with race and gender-based remedies and in 2019 authorized an update disparity study. This Update Disparity Study was commissioned to determine whether there is still evidence of disparity in the utilization of available MWBEs on MSD’s building construction, non-building construction, engineering professional services, and purchases and other services contracts.