Anyone experiencing a problem with their sewer system should notify the Public Works Department immediately at 651-730-2740. Call the Ccty before you contact a drain cleaning service. The main sewer line will be investigated and the necessary action taken. If, however, the problem exists in the sanitary sewer service that connects the structure to the main sewer line, it would be the property owner's responsibility to have the problem corrected. If the correction involves cutting tree roots in the service line, property owners are asked to first call the Public Works Department at 651-730-2740. Note: many homeowners insurance policies exclude sewer back-ups, so homeowners are encouraged to talk to their agent about protection.