There are few things worse for homeowners than to smell sewer gas odor in their homes. Along with being unpleasant, pungent sewage smells could also be hazardous to your health. We’ve compiled this guide to help you trace the source of a sewage smell in your home and walk you through some troubleshooting steps to resolve the issue. However, sometimes, only an expert can fix a sewage problem.

What is Sewer Gas?

Sewer gas is a mixture of gasses created by decomposing organic matter in wastewater systems. It primarily consists of hydrogen sulfide, methane, ammonia, carbon dioxide, and other gasses. When improperly contained or released into a home, it produces a pungent and foul odor, often resembling rotten eggs. Identifying and addressing the source of home sewer gas is essential to maintain indoor air quality and safety.

How to Fix a Leaking Toilet from the Base

Table of Contents

The Top Reasons Why You Smell Sewage in Your Home

There are several potential reasons why you might encounter a sewer gas odor in your home:

» Drain Trap Issues

One of the most common causes of sewage odor indoors is a dry drain trap. Drain traps, often found in sinks, toilets, and other fixtures, are designed to hold a small amount of water, creating a seal that prevents sewer gas from backing into your home. If these traps dry out due to infrequent use or a faulty seal, sewer gas can leak into your living space.

» Blocked or Damaged Vent Pipes

If the culprit isn’t a dry water trap, there’s a chance that damaged vent pipes are to blame. Your home’s plumbing system has vent pipes that allow sewer gasses to escape safely through the roof. If these pipes get damaged or blocked by debris, preventing sewer odors from escaping, they may run back into your home.

» Leaky or Broken Sewer Lines

Cracks, leaks, or damage in your home’s sewer lines can release sewer gas into your living space. This problem may require professional assistance to locate and repair.

» Faulty or Aging Plumbing Fixtures

If plumbing fixtures, such as toilets, sinks, and floor drains, aren’t installed correctly, they can allow sewer gases to leak into areas they shouldn’t. Over time, these plumbing fixtures may deteriorate, allowing sewer gas to escape. Regular maintenance and timely repairs are crucial in preventing this issue.

» Sewer System Backups

Blockages, root intrusion, and other issues in your main sewer line may cause a sewer system backup. When your sewer line backs up, it can push sewage and sewer gas into your home, resulting in a pungent odor.

Also Read: How To Detect A Gas Leak?

How to Get Rid of Sewer Smell in House: The Solutions

If you encounter a sewer gas odor in your home, don’t panic. There are several steps you can take to eliminate the smell:

» Check and Fill Drain Traps

Fortunately, the most common cause of sewer gas smell in the house is also the easiest to fix. If a drain pipe’s P-trap has gone dry, leading to sewer odors, solving the problem is as easy as running a little water. Pour water into your home’s dry traps, and if they continue to dry out, consider a drain trap primer.

» Inspect Vent Pipes

Check for cracks in the vent pipes, where gas and smells could escape. Also, use a flashlight to check the vent pipe for leaves, pine needles, or other debris, which must be cleared out for the sewer gas to vent correctly outside the home.

» Faulty or Aging Plumbing Fixtures

Inspect all plumbing fixtures for visible leaks, damage, or signs of wear and tear. Replace faulty components, such as seals or gaskets, to maintain an airtight seal.

» Professional Inspection

If you cannot identify the source of the sewer gas odor, or if the issue persists, it’s time to call a professional plumber.

» Sewer Line Maintenance

Regular maintenance of your sewer lines can prevent leaks and damage. Consider scheduling our sewer maintenance services to catch potential issues early and keep your plumbing system in shape.

When to Call a Plumber

While you can use DIY sewage smell remedies to resolve sewer gas issues yourself, there are instances where professional help is essential:

» Persistent Odor

If the sewer gas odor persists despite your best efforts to eliminate it, you need professional assistance to identify and address the problem.

» Backed-Up Sewer Lines

In the worst cases, backed-up sewer lines may result in foul-smelling sewage backing out of your drains, causing significant damage to your property. If you experience sewage backups in your home, it could be caused by blockages, root intrusion, or other sewer line problems.

» Visible Damage

If you notice visible damage to your plumbing system, such as compromised seals, corroded pipes, or cracked sewer lines, don’t attempt to fix it yourself. These issues should be handled by a professional to prevent further damage.

» Safety Concerns

If you suspect the sewer gas odor makes you experience nausea, dizziness, or headaches, evacuate your home immediately and contact a plumber for professional sewer repair services.

Prevent Sewer Gas Odor With Proper Maintenance From Conejo Valley Home Services Plumbing & Rooter

If you suspect you have a sewer gas leak, call the professional technicians at Conejo Valley Home Services Plumbing & Rooter. We serve the Conejo Valley and the surrounding areas with efficient, trustworthy work.

Our professional plumbing technicians have the tools and expertise to conduct a thorough inspection of your plumbing system and identify and address the problem. They might also sniff out other plumbing issues before they escalate. For immediate service, call us directly at (805) 499-0448 or submit a contact form online!

Frequently Ask Questions

To locate the source of foul odor in the house, first check the vent pipes, drain traps, and plumbing fixtures. If you need help identifying the source, contact a professional plumber.
Yes, sewer gas can be dangerous, as it contains toxic gasses like hydrogen sulfide and methane, which can be harmful when inhaled in high concentrations. Sewage smell health risks include eye, nose, and throat irritation. At higher levels, these gasses can cause organ damage or death.
Once you’ve eliminated the source of the sewage odor, you can freshen up your home by opening windows for ventilation and using air purifiers—additionally, clean affected areas with water and vinegar or baking soda to remove lingering odors.
Conejo Valley Home Services Plumbing & Rooter place picture
4.9
Based on 367 reviews
kenneth schild profile picture
kenneth schild
2 days ago
Roof tune up
Brenda Mauss profile picture
Brenda Mauss
5 days ago
Conejo Roofing performed an excellent job on our flat roof. Their customer service was outstanding. Someone from the company was always in communication with us every step of the process. We received a 12 year warranty that ensures security for the years to come. I would highly recommend this company for your roofing needs. Brenda M
Mike S profile picture
Mike S
5 days ago
We have used various home service companies for HVAC, electrical, roofs etc over the years and some ok and some not very professional. Conejo did my roof and their people were so crisp in appearance and professionally trained it was like nothing I have experienced. They gave me their ASAP button and said press it for anything you need in the home. I pressed yesterday as I needed to get my HVAC fixed and they called me back right away and scheduled to come out today. They came and fixed and were pleasant and well groomed. I will be using Canejo for anything that goes wrong… Thanks and keep up good work…
Leah Lacayo profile picture
Leah Lacayo
6 days ago
Elijah and Vartan did an awesome job. We're very quick and thorough. Double checked everything. Did a great job!
Jackie O'Hagan profile picture
Jackie O'Hagan
7 days ago
Ronnie did a great job assessing and fixing our plumbing issue which required complex troubleshooting. Ronnie was very knowledgeable and able to fix quickly and efficiently. Thank you!
Rawsyker Ker profile picture
Rawsyker Ker
1 week ago
Darrian came on October 7, 2026 to fix the hot water heater pedestal. He was very professional and did a very nice, finish job. Darrian was friendly and he gave me plenty of time to ask questions and spent time to explain what he did. Thank You Conejo for sending me Darrian to complete the job. He was terrific !
Richard Beene profile picture
Richard Beene
1 week ago
Juan G was fantastic! He diagnosed the problem immediately and had it fixed within 30 minutes! And we had cool air to watch the dodger game
Eric was very personable and extremely knowledgeable. He did a superior job. We route pleased to have him back.
M Lee Bello profile picture
M Lee Bello
2 weeks ago
Miguel & James were terrific plumbers. Proxy, arrived early, polite, smart and friendly. Would hire them again
Drew Newman profile picture
Drew Newman
2 weeks ago
Conejo is the BEST!!! Ronnie fixed everything. Professional, kind and funny. Definitely choosing Conejo for all my plumbing needs.
Kyle Shaw profile picture
Kyle Shaw
2 weeks ago
Plumbing maintenance was a breeze. Ronnie was prompt and on time and had great service.
Lauren Anderson profile picture
Lauren Anderson
2 weeks ago
I’m really glad I happened to find Conejo Services. It’s been one of those crazy months where EVERYTHING keeps breaking or falling apart. We’ve had multiple plumbing issues in the past two weeks; and both times Conejo sent James as our plumber. James is honest, kind, thorough, and goes above and beyond to take good care of homeowners. Beyond James’s professionalism, Conejo has impressed us with their communication style. They text confirmations promptly and also send a photo of the service technician will be, so you are 💯 confident who is knocking on your door is who they say they are. Seriously relieved to find such a trustworthy company—which is rare these days.
Chris Jacobs profile picture
Chris Jacobs
2 weeks ago
Ronnie was great, super through and explained everything well!
Homer B. profile picture
Homer B.
3 weeks ago
James and Miguel came out today to replace our backyard faucet. They arrived earlier in their allotted time window and went straight into their assessment. Took all of 3 minutes for that. After signing the authorization, I had to answer a quick work phone call. By the time I was done with my call, they were done with the job. Both James and Miguel were awesome, super friendly and professional. We would like to have them personally come out and handle our next plumbing job in the future. I highly recommend these guys to get the job done! Conejo Services is a great company to work with. They also installed our water heater and central heating unit a few years ago. They took care of EVERYTHING, to include inspections, asbestos abatement, city permits, ALL of it. They are definitely the one stop shop for heating/cooling, water heaters, plumbing, and probably more. Very trustworthy.
Ronnie was very nice. Work was to fix a plumbing leak. He explained me what he was going to do and he cleaned up after his work. Mentioned when I should turn the water back ON and what to expect. I am happy with his service.
Matt Bague profile picture
Matt Bague
3 weeks ago
Had James come out and help replace an old hose bibb. Was kind enough to let me watch and explain to me what he was doing so I could learn myself. Very friendly and professional.
Tom Clark profile picture
Tom Clark
3 weeks ago
Ronnie did a great job! Knew who to contact to remedy the issue with our water heater.
David Gonzalez took care of my HVAC filter, explained the possible reason for water coming out of the emergency outlet and was wonderful in explaining the next steps needed for troubleshooting.
michael broomer profile picture
michael broomer
1 month ago
I luckily found Conejo Plumbing on Yelp to service our tankless hot water heater, after my original plumber reneged on my lifetime contract. The plumber “Dier” was early for our appointment and after pleasantries was eager to solve the intermittent ignition issues we were experiencing. After an inspection it was noted that the igniter and flame rods had carbon and rust built up. Instead of soaking a customer and replacing our unit a simple service call got us back up and running. I can’t thank Conejo and “Dier” for the prompt service call and their professionalism. Suffice it to say Conejo will be my first call for plumbing issues and I look forward to seeing them in the future for HVAC calls as well. If you’re in need of a professional plumber I highly recommend Conejo as your first choice.
Trupti Guhan profile picture
Trupti Guhan
2 months ago
Outstanding professional service with honest reasonable quotes - review based on both plumbing and HVAC based services. James, the expert assessor, not only did a thorough analysis of the issue, but also took the trouble to explain the scope of work. The work was scheduled for the very next day. The scheduling staff is also polite and helpful(Nancy, Anna). The HVAC technician, William, troubleshooted and got our AC unit running, again quality work at a very reasonable price.

Our innovative solution

  • Water Heaters
  • Drain Cleaning
  • Re-Pipe Specialists
  • Sewer Inspection

Why choose Conejo Valley Home Services Plumbing & Rooter?

  • Trusted, certified technicians
  • Emergency Repairs
  • Available 24/7
  • Exceptional Service Guarantee
  • Locally Owned and Operated
  • Licensed and Insured
  • Workmanship Parts Guaranteed
  • Courteous, Uniformed Professionals
  • Convenient Appointment Times

Request Services

Fill the form below to Request Home and Commercial Plumbing Services

"*" indicates required fields

This field is for validation purposes and should be left unchanged.

Request Service

Fill the form below to Request Plumbing Services, Repair & Installation

"*" indicates required fields

This field is for validation purposes and should be left unchanged.
scroll to top button