Sewage backup is a plumbing issue that occurs when wastewater flows backward into a building. It can be a major health hazard, as it can lead to the spread of bacteria and other contaminants. There are a number of different causes of sewage backup, including: **Causes of Sewage Backup** * **Clogged drains:** This is the most common cause of sewage backup. When drains are clogged with grease, hair, or other debris, wastewater can build up and eventually overflow. * **Damaged pipes:** Pipes can be damaged by tree roots, construction, or other factors. This damage can create cracks or holes in the pipes, which can allow wastewater to leak out. * **Tree roots:** Tree roots can grow into sewage pipes and block them. This can cause wastewater to back up into the building. * **Heavy rainfall:** Heavy rainfall can overwhelm sewer systems, causing sewage to back up into buildings. * **Frozen pipes:** Frozen pipes can block the flow of wastewater, causing it to back up into the building. **Effects of Sewage Backup** * **Flooding:** Sewage backup can cause flooding, which can damage floors, walls, and furniture. * **Health hazards:** Sewage backup can lead to the spread of bacteria and other contaminants, which can cause a variety of health problems, such as gastrointestinal illness, skin infections, and respiratory problems. * **Property damage:** Sewage backup can damage carpets, furniture, and other belongings. * **Emotional distress:** Sewage backup can be a traumatic experience, causing stress and anxiety. **How Does Sewage Backup Happen?** Sewage backup can happen when the flow of wastewater is blocked. This can be caused by a variety of factors, including: * **Clogs:** Clogs can form in drains, pipes, or septic tanks. These clogs can be caused by grease, hair, food, or other debris. * **Tree roots:** Tree roots can grow into sewer lines and block them. * **Collapsed pipes:** Pipes can collapse due to age, corrosion, or damage. This can block the flow of wastewater. * **Frozen pipes:** Pipes can freeze during cold weather, blocking the flow of wastewater. * **Heavy rainfall:** Heavy rainfall can overwhelm sewer systems, causing sewage to back up into buildings.