Sewage Backup and Health Risks: What Homeowners

A sewage backup is more than an unpleasant household emergency—it can create serious health risks for anyone exposed to contaminated water and waste. When wastewater backs up into homes, it may carry a mix of pathogens that can cause gastrointestinal illness, skin infections, and respiratory problems, especially if cleanup is attempted without protection.

Health officials typically warn that the risk depends on what the backup contains. If the source is municipal sewer waste, the contamination is generally higher. If the issue is tied to storm drains, the situation can still be dangerous because floodwater may mix with sewage and chemicals from outside areas.