What to Do When Your Sewer Backs Up: A Step-by-Step Guide

A sewage backup is one of the most unpleasant and potentially dangerous home emergencies. Sewage is classified as Category 3 water — the most contaminated category — containing bacteria, viruses, parasites, and toxic gases. Improper cleanup can expose you and your family to serious health risks. This guide explains what to do and what not to do when your sewer backs up.

What not to do: Do not attempt to clean up sewage backup yourself without proper protective equipment. Do not use the plumbing in your home until the backup is resolved. Do not run the dishwasher, washing machine, or any drain that connects to the affected line. Do not use bleach as your primary disinfectant — bleach is not effective against all sewage pathogens and does not address the full scope of contamination.

Step 1: Stop using the plumbing. Turn off the water supply to your home if necessary to prevent additional sewage from backing up. Avoid using any drains, toilets, or water-using appliances until the blockage is cleared.

Step 2: Call a plumber to clear the blockage. A plumber will identify and clear the blockage causing the backup, whether it is a root intrusion, grease buildup, collapsed pipe, or municipal sewer issue. Do not attempt to clear a main line blockage yourself.

Step 3: Call a professional biohazard cleanup company. Texas Restoration Group provides professional sewage cleanup services with full personal protective equipment, EPA-registered disinfectants, and proper biohazard disposal. All materials that have been in contact with sewage must be removed and properly disposed of.

Step 4: Document the damage for your insurance claim. Take photos of all affected areas before cleanup begins. Sewage backup is typically covered by homeowners insurance as a water damage event, though some policies require a separate sewer backup endorsement.

Step 5: Ventilate the affected area. Open windows and doors to ventilate the area and reduce exposure to sewage gases including hydrogen sulfide. Do not use fans that could spread contaminated air to unaffected areas.

Step 6: Professional cleanup and disinfection. Our biohazard cleanup team removes all contaminated materials, thoroughly disinfects all affected surfaces with EPA-registered antimicrobials, and treats for odor using professional odor elimination equipment.

Texas Restoration Group responds to sewage backup emergencies throughout Austin and Central Texas 24/7. Call (512) 883-7364 for immediate professional sewage cleanup.