Audit (MS4 Program)

An MS4 audit is used to evaluate overall MS4 storm water program implementation, and identify problems the local government may have in implementing the program. MS4 audits involve a comprehensive review of the local government's MS4 storm water program including: a review of the program elements including structural and source control measures, detection and removal of illicit discharges and improper disposal into storm sewers, monitoring and controlling pollutants in storm water discharges, implementing and maintaining structural and nonstructural Best Management Practices (BMPs), verification of implementation schedules, assignment of appropriate individuals, review of the inspection and enforcement program for industrial facilities and construction sites, evaluation of the dry weather screening program, determination of whether controls are in place and are in good working order, and whether facilities have schedules for construction of structural control measures.