The AMC Mosquito backyard guide

Mosquitoes in the House: How to Find the Source

Check screens, doors and garage openings, then look for water in vases and saucers. Here’s how to find where mosquitoes in your house come from.

In this guide

Check entry points

CDC recommends maintaining screens and keeping doors closed. Include patio doors and garage openings in your inspection.

Note whether mosquitoes appear near one entrance or throughout the house. A pattern helps distinguish an entry issue from an unidentified indoor source.

Inspect accessible indoor areas

Vases and flowerpot saucers can hold water. CDC also identifies dark, humid resting areas: under sinks and furniture, and in showers, closets and laundry rooms. Inspect accessible places without dismantling building systems.

If identification is uncertain, take a clear photo. Not every small flying insect indoors is a mosquito.

Keep up a weekly routine

Once a week, empty, scrub, turn over, cover or throw out anything indoors that holds water. CDC also recommends keeping doors closed, including the garage door, and using air conditioning when you can.

A propped-open door during yard work or a torn screen behind furniture is an easy thing to miss, so check them again if mosquitoes come back.

Look just outside your doors

Check the same water-holding items around the doors you use most: planters, buckets, toys, birdbaths and flowerpot saucers. CDC also points to dark, humid spots outdoors, such as under patio furniture or a carport.

Finding those spots doesn’t prove where the mosquitoes in your house came from, but they’re worth clearing up either way.

If they keep coming back

CDC says an indoor insecticide on its own won’t keep a home free of mosquitoes. Screens and removing water come first, and a pest control professional is an option if the problem continues.

Sprays and foggers made for indoor use can work quickly, but they may need to be reapplied. Read the label before you buy one.

Match the service to the problem

If mosquitoes are inside your home, tell us when you call. Our yard service covers outdoor treatment, so we’ll need to discuss what help you’re looking for.

Any indoor insecticide must be labeled for that setting and used as directed. Do not bring an outdoor spray inside merely because it targets mosquitoes.

Sources & further reading

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