Summer Mosquito Check:
Where Standing Water Hides Around Your Yard

Summer evenings should be for enjoying the backyard—not spending the entire time swatting mosquitoes.
How often should Hamilton homeowners remove standing water?
The City of Hamilton recommends removing standing water at least once every seven days because mosquitoes can lay their eggs in very shallow water.
One of the simplest things Hamilton homeowners can do is complete a quick standing-water check after rain and as part of their regular yard maintenance.
Why Does Standing Water Matter?
Mosquitoes breed in standing water. The City says reducing these breeding areas can help reduce the number of mosquitoes and the risk of West Nile virus in the community.
West Nile virus is transmitted to people mainly through the bite of an infected mosquito. Not every mosquito carries the virus, but removing potential breeding areas is a practical prevention step. City of Hamilton: West Nile Virus

Where Should You Check for Standing Water?
Standing water is not always found in an obvious puddle. A small container, toy or flowerpot saucer may hold enough water to become a potential mosquito breeding area.

The Public Health Agency of Canada also recommends draining water from rain barrels, toys, flowerpots, tires and wading pools. It advises replacing the water in outdoor pet dishes and bird baths at least twice a week and cleaning eavestroughs regularly. Public Health Agency of Canada: West Nile virus prevention
A Five-Minute Mosquito Check After It Rains
Empty the water, turn unused containers upside down and address anything that repeatedly collects rainwater.

For ponds, pools, rain barrels or other features designed to hold water, follow appropriate maintenance and treatment guidance instead of simply emptying them.
Do Tall Grass and Overgrown Bushes Attract Mosquitoes?
The City of Hamilton notes that mosquitoes favour weeds, tall grass and bushes. Keeping overgrown areas under control can therefore be another useful part of summer yard maintenance.
Trimming vegetation does not replace removing standing water, but it can help make the yard less inviting to resting mosquitoes.
How Can You Keep Mosquitoes Out of the House?
Inspect window and door screens for holes, loose edges or damaged frames. Hamilton and the Public Health Agency of Canada both recommend maintaining screens to help keep mosquitoes outside.
When spending time outdoors, federal guidance recommends wearing clothing that covers exposed skin and using an insect repellent containing DEET or icaridin according to its label directions.
Why This Matters When Selling a Home
A standing-water check is primarily a health and maintenance measure, but it can also improve how a backyard presents to buyers.
People viewing a home want to picture themselves enjoying the outdoor space—gardening, eating outside, watching children play or relaxing on the patio.
Clogged eavestroughs, water-filled containers and overgrown corners may suggest that outdoor maintenance has been overlooked. A clean and usable yard makes it easier for buyers to see the lifestyle the property offers.
Your Weekly Summer Yard Routine
- Walk around the entire property.
- Empty containers holding rainwater.
- Refresh bird baths and outdoor pet dishes more frequently.
- Clean clogged gutters and drainage areas.
- Turn unused containers upside down.
- Trim weeds and overgrown vegetation.
- Inspect doors and window screens.
- Note low spots or drainage problems that need attention.

A few minutes of prevention can make the yard more comfortable, better maintained and more showing-ready.
How can Hamilton homeowners reduce mosquito breeding around their property?
Remove standing water from bird baths, tires, containers, flowerpot saucers, pool covers, wading pools, gutters, drainage areas and children’s toys. Hamilton recommends doing this at least once every seven days because mosquitoes can lay eggs in very shallow water. Bird baths and outdoor pet dishes should be refreshed at least twice weekly under federal guidance.
Frequently Asked Questions
Sources
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