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The Daily Insight

What is a typical cause of a sewer backup?

Author

Sarah Duran

Published Mar 31, 2026

A sewer backup occurs when something blocks the normal flow of wastewater from your house to the city’s sanitary sewer, and the sewage starts to back up into your home. Broken or collapsed sewer lines. A cracked or deteriorated sewer lateral (the pipeline between the city’s sanitary sewer main and your home)

What causes water backup in house?

When heavy rain falls, the sewer system can get so full of rainwater that it forces water (and sewage) up through the home systems to which it is connected. The result is a sewer backup in those homes.

How do you prevent sewage backup during a flood?

Six Tips for Sewer Backup Prevention

  1. Maintain your sewer lateral.
  2. Dispose of grease properly.
  3. Dispose of paper products properly.
  4. Consider plastic piping.
  5. Correct illegal plumbing connections.
  6. Consider a backwater prevention valve.

How do you prevent sewer backup?

How to prevent backups in your sewer lateral and in the city main

  1. Properly dispose of grease.
  2. Properly dispose of paper products.
  3. Periodically cut tree roots.
  4. Replace your line with new plastic pipe.
  5. Correct illegal plumbing connections.

How do I stop my sewage from backing up?

How do you know if your main sewer line is clogged?

Signs Your Sewer Line May Be Clogged

  1. Dark Water. One of the signature symptoms of a main-drain clog is water backing up in your tubs or showers.
  2. Slow-Moving Drains. Take a minute to think about the drains in your home.
  3. Gurgling Sounds.
  4. Clogged Plumbing Fixtures.
  5. Turn Off the Water.
  6. Call a Plumber.

How bad is a sewage backup?

Sewage backup lets off air-borne contaminants along with the physical contaminants. Inhaling the vapors emitted by raw sewage can lead to gastroenteritis, which is commonly associated with fever, vomiting, cramping, and potentially death if left untreated.

How do you fix a sewer backup?

Quick Fixes for Sewer Backups

  1. Use a Plunger – the easiest and most available drain opener around.
  2. Buy a Liquid Drain Cleaner – to unclog a sink or bathtub.
  3. Release Pressure – by turning off the water at the main supply first.
  4. Chemical Drain Cleaning – help with tree roots blockages.

A sewer backup occurs when something blocks the normal flow of wastewater from your house to the city’s sanitary sewer, and the sewage starts to back up into your home. Aging sewer systems. Too much rainwater or melted snow entering the sewer system at once. Broken or collapsed sewer lines.

How long does sewage contamination last?

After one day you will have 100,000 bacteria/100ml, and it will take 5 additional days to reach 1 bacterium/100ml….By Dr. Harriet Burge.

OrganismSubstrateSurvival Time
E. coliWater> 100 days
EnterococcusDry Surfaces> 24 hours
Staphylococcus aureusHospital dry surface> 9-11 days
E. coliLettuce> 25 days

Is sewage backup common?

Causes of sewer backups While most basement water problems are not caused by sewer backups, the Civil Engineering Research Foundation reports that the number of backed up sewers is increasing at an alarming rate of about 3 percent annually. There are a number of causes of sewer backups—here are some of the most common.

Can you get sick from sewage backup?

Sewage backup releases physical, air-borne contaminants. Inhaling these vapors can lead to a variety of symptoms, including cramping, vomiting, fever, and severe forms of gastroenteritis. If left untreated, inhaling sewage backup for long periods of time may lead to death.

How do you clean up a sewer backup?

How to Clean Up Sewage Backup

  1. Remove the sewage water as soon as possible – use a pump if there is a lot of water or a wet-dry vacuum with an appropriate filtration device if the spill is small;
  2. Shovel dirt, soil, and debris into strong plastic bags and dispose of them immediately;

How do I fix a sewage backup in my basement?

Fix Sewage Backup in Basement Floor Drains The acidity in Coca-Cola can help clear a sewage backup but may leave a residue itself. A drain snake is a great tool to unclog plumbing fixtures, but if you don’t have one, you could use a hose or plunger to clear a clogged drain.

Can you get sick from breathing in sewage?

Hydrogen sulfide is the primary gas in sewer gas. According to research , hydrogen sulfide has shown to be toxic to the oxygen systems of the body. In high amounts it can cause adverse symptoms, organ damage, or even death.

How do you get sewer smell out of house after backup?

Wash intensively all surfaces and structures with a solution of one part chlorine bleach and four parts cold water, mixed with a small amount of mild non-ammonia dishwashing detergent (be careful never to mix chlorine bleach and ammonia, as they produce toxic fumes).

What kind of water damage can sewer backup cause?

It is a very unpleasant type of water damage because it often involves dirty water from the sewers that will not only destroy your personal property but can also impact your health because it’s so unsanitary. Most people don’t know a lot about sewer backup coverage if they’ve never had to make a claim.

How can I find out if my insurance covers sewer backup?

In some cases, water damage coverage may be added to your policy. You can check to see if you have special water damage coverages like sewer backup added as an endorsement by looking at your policy’s declaration page. Sewer or Water Backup Coverage — Home Insurance Claims How to know when water damage is covered by insurance or not.

When to file a lawsuit for sewage backup?

If you do not file a notice of claim within six months or one year of the harmful sewage backup or stormwater flooding incident, you will be legally barred from filing a subsequent lawsuit against the offending municipality, county or state government.

Is there an insurance exclusion for sewage backup?

Many insurance policies have “water exclusions” that apply to sewage backup. In other words, even if you have good homeowner’s or commercial property insurance, it is likely that damages occurring as the result of a sewer backup are not covered. If you do not want to get stuck holding the bill, you need to know your legal rights.