Mosquito Control in Toronto
If you need mosquito control in Toronto, AstraHive Pest Control finds breeding zones, treats standing water that cannot be drained and treats resting areas, backed by a 90-day warranty. Toronto Public Health's West Nile surveillance data shows why private property matters.
West Nile virus and mosquitoes: what Toronto Public Health reports
- Toronto Public Health sets 22 mosquito traps across the city once a week from mid-June to mid-September and tests the mosquitoes for West Nile virus.
- Toronto reported 83 West Nile positive mosquito pools in 2023, the second highest since 2002, and 78 confirmed and probable human cases in 2025.
- The City treats catch basins with larvicide (methoprene, Bacillus sphaericus and Bti) in two rounds each summer, and its program targets Culex mosquitoes, the most common West Nile carrier in the region.
West Nile virus and mosquitoes in the news near Toronto
| When | What was reported | Source |
|---|---|---|
| 30 July 2026 | Toronto Public Health reported the first human case of West Nile virus in the city for 2026. | CTV News Toronto: first human West Nile case of 2026 |
Paraphrased from the linked sources. Counts are as reported on the date shown.
Mosquitoes in your Toronto home or building?
Our licensed technicians start with an inspection and a clear plan for your property.
Call 905-925-8427How AstraHive Pest Control gets rid of mosquitoes in Toronto
- Find the breeding zones: gutters, low-lying areas, ornamental ponds and bird baths first.
- Larvicide on standing water that cannot be drained.
- Residual treatment on dense foliage, shaded resting zones and foundation and perimeter edges.
- Monthly follow-up from May through September, if you want it.
Products are Health Canada approved and applied according to the product label, and our technicians are licensed by the Ontario Ministry of the Environment, Conservation and Parks (MECP). Our standard 90-day warranty applies to our treatments, and your technician confirms the terms for a seasonal mosquito program when you book.
Private yards in Toronto
23% of homes in Toronto are detached houses with private yards. Gutters, planters, tarps and bird baths on a private lot are breeding sites that public larviciding does not reach.
Source: Statistics Canada, 2021 Census, private households in Toronto. Shares of occupied private dwellings.
Mosquitoes near Toronto: what the sightings show
GBIF, the open biodiversity database, holds 112 recorded sightings of Culex, Aedes and Culiseta mosquitoes within roughly 13 km of Toronto, and the busiest month is August with 30.
| Species or group | Recorded sightings |
|---|---|
| Northern house mosquito (Culex pipiens) | 7 |
| Aedes mosquitoes (Aedes) | 105 |
Source: GBIF.org occurrence records for Canada. These are observations logged by naturalists and museums, so counts show where people looked as well as where a species lives.
Within about 4 km of the centre of Toronto, OpenStreetMap maps 7 named creeks or rivers, including Don River, Keating Channel, Yellow Creek and Mud Creek and 18 named ponds or water bodies, including Devonian Pond, Berczy Park Dog Fountain and Yonge Slip. Still water in ponds, stormwater ponds, ditches and catch basins is what health units monitor for mosquito breeding.
Water on your Toronto property, and when mosquitoes breed
Public programs treat public catch basins and surface water; gutters, buckets, tarps, ornamental ponds and bird baths on a private lot are separate. July is the warmest month at the Toronto station at 22.3 °C, with 11.8 days a year above 30 °C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean daily maximum (°C) | -0.7 | 0.4 | 4.7 | 11.5 | 18.4 | 23.8 | 26.6 | 25.5 | 21.0 | 14.0 | 7.5 | 2.1 |
| Total precipitation (mm) | 62 | 55 | 54 | 68 | 82 | 71 | 64 | 81 | 85 | 64 | 84 | 61 |
| Days with rain of 0.2 mm or more | 5 | 5 | 8 | 11 | 13 | 11 | 10 | 10 | 11 | 12 | 11 | 7 |
Environment and Climate Change Canada climate normals, 1981 to 2010, Toronto station (2.0 km from Toronto). A station is the nearest one with a full set of normals, not a reading from your street.
- All properties have to be kept free of pests, including rodents and insects.
We also serve Leslieville, East York, York, Etobicoke, North York.
- Climate station: Toronto, 2.0 km from Toronto.
- Public health unit: Toronto Public Health.
- By-law: Municipal Code Chapter 629, Property Standards.
- Nearby areas we serve: Leslieville (4 km), East York (6 km), York (9 km), Etobicoke (11 km), North York (12 km).
Toronto's climate through the year
Environment and Climate Change Canada climate normals 1981 to 2010, Toronto station, 2.0 km from Toronto. A station is the nearest one with a full set of normals, not a reading from your street.
What this means for mosquitoes: breeding follows warmth and standing water, so the warm and wet months on this chart set the season.
Frequently asked questions: Toronto
How warm does Toronto get in July?
The Toronto station's July mean is 22.3 degrees Celsius, with about 11.8 days a year above 30 degrees Celsius.
How do I reduce mosquitoes around my yard?
Drain standing water in gutters, bird baths and low spots, and use larvicide on water that cannot be drained. Residual treatment goes on shaded foliage and foundation edges. OpenStreetMap maps water near the centre of Toronto, including Don River, Keating Channel and Yellow Creek, and damp ground near water suits mosquitoes.
Why are there more mosquitoes after rain?
Rain fills containers, gutters and ditches, which become breeding sites within days. The Toronto station records about 831 mm of precipitation a year near Toronto, with September the wettest month at 85 mm, and damp conditions suit mosquitoes.
Sources
- City of Toronto: Property Standards, pests, rodents and vermin (311) . Chapter 629, owner responsibility, complaint process
- City of Toronto: Rat Response Plan (June 2025) . rodent service requests 2015 to 2024
- City of Toronto: Rat Control . owner and City responsibilities, prevention
- City of Toronto: RentSafeTO building owner requirements . pest inspection and records rules
- Tribunals Ontario, Landlord and Tenant Board: Maintenance and Repairs . landlords must control pests such as cockroaches and mice; municipal standards
- City of Toronto: Bed Bugs . bed bugs and treatment roles
- City of Toronto: West Nile Virus Surveillance and Reporting . 22 traps, positive pools, human cases
- City of Toronto: City of Toronto Larviciding Program . 2026 rounds, larvicides, Culex
- Environment and Climate Change Canada: Canadian Climate Normals 1981-2010 . monthly temperature, precipitation, frost days and degree-days
- CTV News Toronto: first human West Nile case of 2026
- Statistics Canada: structural type of dwelling by tenure, 2021 Census (table 98-10-0240-01) . dwelling types and renter households
- Statistics Canada: dwelling condition by period of construction, 2021 Census (table 98-10-0233-01) . age of homes and repair needs