Drain Flies in Ontario
Identify drain flies and locate the moist organic buildup that may be supporting indoor breeding.
What drain flies look like
Drain flies are tiny, fuzzy, moth-like flies that rest with broad wings over the body. They often remain near sinks, floor drains and other moist locations.
Where activity develops
Larvae develop in wet organic film. A nearby drain can be suspected, but leaks, equipment pans, sump areas and hidden wastewater sources should also be considered.
Signs worth documenting.
Small fuzzy flies on walls near drains
Adults returning after surface cleaning
Activity concentrated in one wet area
Make the property less favourable.
Prevention depends on correct identification and the conditions supporting activity. These steps are a practical starting point.
Identification before treatment
Similar-looking pests can require very different responses. Avoid applying a product until the pest, location and permitted label directions are clear.
Serving Eastern Ontario
Emerald Pest Control serves Belleville, Kingston, Trenton, Napanee, Brighton, Stirling, Picton, Quinte West and surrounding communities.
Not sure whether it is drain flies?
Send a clear photo and tell us where it was found. We can help confirm the pest and discuss appropriate next steps.