Note: Call 651-458-2808 to report a water leak, emergency water problem, sanitary sewer back-up, or an emergency sewer problem. The Cottage Grove Public Works Department answers phone calls 24-hours a day including weekends and holidays.

About the Division

The Sewer Division ensures a trouble-free, well-maintained wastewater collection system for our customers. This includes:

  • Cutting tree roots and maintaining invasive growth
  • Jetting and vacuuming for grease and debris buildup
  • Televising sewer lines to identify problems
  • Monitoring sewer line flows to identify possible inflow and infiltration
  • Maintaining and repairing all related sanitary sewer mains, structures, and services
  • Maintaining the lift station facility
  • Manhole rehabilitation


The City of Cottage Grove is responsible for maintaining the main sewer line. The City is not responsible for problems in the house or the sewer line between the main sewer and the house. Problems in these areas are the responsibility of the property owner. If water is coming up in the house when no water is being used, or if your neighbors are experiencing water problems there could be a mainline sewer issue. Immediately call Public Works at 651-458-2808.