Septic Backup Emergency

What are the signs of a septic backup?

Look for slow drains throughout the house, gurgling noises, sewage odors, toilets that will not flush, wet or spongy ground over the drainfield, or sewage in the lowest drains or tub. Some of these are early warnings that the system is struggling.

If sewage is coming up inside the house, treat it as an emergency. Raw sewage can carry germs that cause illness.

• Slow drains in every fixture
• Gurgling sounds
• Odors indoors or near the tank
• Soggy or lush patches over the drainfield
• Sewage in tubs, sinks or floor drains

What should you do first?

Stop using water. That means no showers, laundry, dishwasher or toilet flushing. Every gallon you send down adds to the problem. If it is safe, shut off the water to the house or keep fixture use to a minimum while you wait.

Keep children and pets away from affected areas. Do not walk through standing sewage in bare feet, and do not use fans or electrical devices in wet areas.

If water has already backed up, do not try to pump or flush it yourself. Pumping out a tank while the drainfield is saturated can send the problem back into the house, and tank lids and openings can be dangerous because gases build up and there is a risk of falling in. Leave tank work to professionals.

Who do you call?

Call a licensed septic professional as soon as possible, and tell them it is an emergency. Many areas also require permits or inspections for septic repairs, and your county health department or state environmental agency is the place to ask. The EPA septic systems page is a good starting point for how systems work.

Do not add chemicals or additives in hope of a quick fix. Some products can harm the system, and a professional can tell you what is helpful.

Ask the contractor to explain what they found, what they did and what they recommend. Keep the invoice, since many counties and lenders want proof of service.

• Licensed septic contractor
• County health department
• Plumber if the problem is inside the house
• Your insurance agent for damage

How do you protect your health?

Sewage can carry bacteria, viruses and parasites. Wash hands thoroughly with soap and clean water, wear waterproof gloves and boots near affected areas, and keep food away. Keep children, older adults and anyone with a weakened immune system out of the area.

If anyone develops vomiting, diarrhea or fever, call a doctor. The CDC and your county health department can explain the risks and cleanup guidance.

How do you handle cleanup?

Cleanup after a sewage backup involves disinfecting surfaces and removing materials that cannot be cleaned, such as soaked carpet. The county health office and the CDC provide guidance, and a professional cleanup service may be a wise choice for large areas. Do not use a household vacuum on sewage.

Document damage with photos before cleanup, and contact your insurance agent. Policies differ on sewage backup, so ask what is covered.

After cleanup, wash your hands again and launder work clothes separately. Keep children away until the area is declared safe by the cleaner or the health office.

What causes septic systems to fail?

Common causes include a full tank that has not been pumped, a clog in the lines, damaged pipes, tree roots, heavy water use, flushing items that do not belong, and a drainfield that is saturated or worn out. Heavy rain and flooding can overwhelm a system as well.

A professional can find the actual cause. Pumping alone may not fix a failing drainfield, and repairs can be costly. Ask for a clear written explanation of what is wrong.

• Tank not pumped on schedule
• Clogs or broken pipes
• Roots in lines
• Overloaded or saturated drainfield
• Flushing wipes, grease or chemicals

How do you prevent a repeat?

Learn where your tank and drainfield are and keep vehicles and livestock off them. Spread out water use, such as laundry across the week. Ask a professional how often your system should be inspected and pumped, since that depends on the tank size and how many people live in the house.

Keep records of inspections and pumping. If you are buying a home, ask for a septic inspection. Some agencies, such as USDA Rural Development, may offer help with repairs for eligible households, so ask them.

• Keep records of pumping and repairs
• Keep heavy loads off the drainfield
• Spread out water use
• Only flush toilet paper and human waste

Last reviewed: November 12, 2026. Written by the Rural Farm Life Editorial Team. See our editorial policy.