MSD is the sewer and stormwater layer to check

Rainwater and wastewater can share more than a rainy-day problem in St. Louis. MSD Project Clear separates wastewater pipes, stormwater pipes, and combined sewers, and the city of St. Louis is part of a combined sewer system with nearby county areas. In a combined system, pipes carry both wastewater and stormwater.

That puts some property questions outside the usual City Hall path. A sewer backup, stormwater concern, billing issue, or system emergency may need the Metropolitan St. Louis Sewer District instead of a City department.

The split is simple once the layers are named. Building, zoning, streets, and many service requests stay with the City. Sewer and stormwater system questions move to MSD. For renters and owners, that can save time when the problem is wet pavement, basement backup, drainage, or a utility bill rather than a building permit or street complaint.