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How to Get Rid of Sewer Flies? Are They Harmful?

Updated: Jan 30

Sewer flies are small insects that can become a nuisance in homes and businesses. They are often found in bathrooms, kitchens, and other areas with moist conditions. 

If you have noticed an increase in these pesky insects you may be wondering how to get rid of them. The good news is that while sewage flies can be annoying, they do not pose any significant health risks to humans. 

However, their presence can indicate a potential plumbing issue that should be addressed. So, how do you eliminate these small black flies in the house? Reach out to this blog post till the end!

What Are Sewer Flies?

what are sewer flies

Sewer flies, also known as moth or drain flies, are a common household pest that can be found in and around drains, and sewage systems. 

Sewer flies typically come from eggs laid by adult flies in damp areas such as drains, pipes, and septic tanks. This can include food particles, grease, hair, soap residue, and even clogged sewerage lines.

These pesky insects are about 1/8 inch in length and have a fuzzy appearance due to their long, delicate hairs. In moist areas, these fluttering or hovering insects are often mistaken for fruit flies or gnats.

Why Permanently Removing Sewer Flies Is Crucial?

Sewer flies in the house are common now. While they may seem harmless at first glance, sewer flies can threaten your health and well-being. They carry bacteria on their bodies that can cause illnesses such as diarrhea, dysentery, and even tapeworm infections.

In addition to health concerns, the causes of sewer flies can damage surfaces with their acidic feces. Furthermore, the presence of sewer flies can also indicate larger problems with your plumbing or sewage system. 

They are also a nuisance to deal with. They can quickly reproduce and infest an entire area, making it easier to eliminate them with professional help.

How To Get Rid Of Sewer Flies?

How To Get Rid Of Sewer Flies?

Sewer flies are not only unpleasant to look at, but their presence can also indicate potential health hazards. Fortunately, several effective sewer flies treatment methods exist to eliminate flies and prevent future infestations.

▪️ Identify The Source

The first step in treating a sewer fly problem is identifying the source of the infestation. Check all areas, especially sewer flies outside the tank where moisture is present. Such as sewer flies in showers, sinks, drains, toilets, and garbage disposals. Look for any clogs or buildup that may provide a breeding ground for the flies.

▪️ Clean And Disinfect

Once you have identified the source of the infestation, it's crucial to thoroughly clean and disinfect the affected areas. Sewer flies in bathroom are common. For this or other infected areas use natural sewer fly remedies, take hot water, bleach, or vinegar to clean any surfaces where the flies may be present. 

▪️ Remove Organic Matter

Sewer flies feed on organic matter, so it's essential to remove any potential food sources from their environment. Regularly clean out garbage disposals, trash cans, and other areas where food particles may accumulate.

▪️ Use Drain Cleaners

If you notice a buildup of junk or debris in your drains, use a drain cleaner to remove it. This will not only help eliminate potential sources of food for sewer flies but also prevent clogs that can attract other types of flies.

▪️ Seal Cracks And Openings

Sewer flies can enter your home through even the smallest cracks or openings, so it's essential to seal any potential entry points. Use caulk or weather stripping to seal gaps around windows, doors, and pipes. 

▪️ Keep Moisture Under Control

Sewer flies thrive in moist environments, so keeping moisture levels low can help prevent infestations. Fix any leaks in your plumbing and ensure proper drainage around your home by regularly cleaning gutters and downspouts.

How Long Do Sewer Flies Live?

How Long Do Sewer Flies Live

The life cycle of a sewer fly begins as an egg laid by adult females near the edges of moist areas such as sink drains or even moist soil.

Once emerged as adults, sewer flies only have a lifespan of about 2-4 weeks. Most commonly, they live close to sewage systems or decaying organic matter, where the conditions are warm and humid.


Getting rid of sewer flies involves a combination of thorough cleaning, ensuring proper drainage, and regular maintenance of your sewage and septic systems

Remember, these pests thrive in moist environments, so eliminating any stagnant water or organic build-up is key to preventing their return.

For professional assistance and lasting solutions, consider reaching out to Barnes Sewer & Septic. Don't let sewer flies disrupt your peace of mind. Contact us at (765) 584-7295 today and take the first step towards a cleaner, healthier home.

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