Public sewer and private lines
Spokane County maintains public sewer mains, while the service line connecting a house to the street main is the homeowner's responsibility. The county explains that distinction in its wastewater maintenance FAQ. A sewer backup inside a Fairwood home may involve the private line, the public main or both.
Call for sewage cleanup when wastewater reaches the floor. Mention whether several drains are backing up or water is appearing outside. Those observations help separate the plumbing investigation from the indoor cleanup. Keep people away from affected rooms. Your technician assesses contaminated flooring, wall edges and contents; clearing a drain does not clean the materials it flooded.
Floodplain work and repairs
Spokane County requires a floodplain development permit for development on a parcel containing mapped floodplain. The county's floodplain information includes grading, excavation and structures among the activities it regulates. That rule matters when a proposed repair involves changing drainage or excavating beside a foundation.
Call about indoor water now, even when the repair scope is still uncertain. During planning, any proposed exterior changes need review against the parcel's mapped conditions and county requirements. Water inside a basement alone does not establish that the parcel is in a floodplain. Your technician records the entry point and affected materials so the repair scope addresses the source as well as the wet room.