MSD Project Clear responds to emergencies throughout the service area. The emergency team aims to respond to 90% service calls within four hours. If you experience a basement backup or see a sewer overflow, blocked stormwater inlet, or suspect damage to a sewer pipe, please don’t hesitate to reach out to MSD customer service, at (314) 768-6260, who may dispatch an investigator to discover whether MSD has the ability to alleviate the situation.