Moth Fly

Our remedy for moth fly control

First, contact us. These are a nuisance, but also a health threat because of where they live and breed and what they can transmit to open food, for instance. Finding the breeding sites and eliminating them is key to controlling drain flies. Inspection needs to focus on any place where wet organic matter has accumulated, including slimy drains, dirty garbage cans, bird baths or feeders, clogged roof gutters, moist compost and septic tanks. Cleaning drains regularly will prevent biofilm build-up, which ultimately attracts pests like these.

Flies are vectors for spreading bacteria and diseases. Listeria monocytogenes, a bacterium responsible for Listeriosis, is primarily transmitted to humans through the consumption of contaminated food. It is essential to practice proper hygiene and food safety measures to prevent Listeria and other pathogens. Reducing and eliminating fly populations is key to this process.

Need a professional drain sanitation service? We can help with that! Contact us today for a free quote or to add it to your existing maintenance program.

How to Identify a Moth Fly


The moth fly, also known as the drain fly, is hairy or fuzzy, resembling a tiny moth; black or brown. About 1/4″ long.


Drain flies breed in heavily decaying organic matter that remains fairly wet. They are commonly found in sewage treatment facilities. In other commercial buildings they are often seen in restrooms, mop closets and boiler rooms, breeding in drain traps, sump pumps, and any very wet, poorly maintained area. Drain flies are slow, weak fliers, and indoors are usually seen crawling on walls or other surfaces. When they do fly, it is usually only for a few feet and then in characteristic short, jerky lines.


Heavily decaying organic matter such as is found in sewage sludge is their preferred diet.

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Not Your fly?

Here are some of the other flies found in the Midwest.

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