East Gwillimbury has launched an enhanced summer mosquito monitoring and control program. Throughout the summer, licensed technicians will be spraying various Town-owned areas to help manage OR limit mosquitoes in our open spaces. Treatment will include town parks, trails, and open spaces.

The mosquito control program will help to limit mosquitoes in Town spaces, and treat potential mosquito breeding habitats, which may impact nearby communitiesTo learn more about the program, please read the Mosquito Control Program Update memo. 

Product used

The spray used is natural bacteria known as Bti. Bti biodegrades in the breeding sites within 48 hours. Bti is harmless to humans, pets, and the environment. Bti is also known by Vectobac.

Take the time to view the educational YouTube video entitled "Biological Larvicides: The Natural Solution" for additional information. For further information please visit or visit Health Canadas website.

What can you do at home?

There are various options available for you to manage mosquitoes on your property. Follow these tips to limit mosquitoes at home:  

Protect yourself - Take precautions when outside in the early morning and early evening when mosquitoes are more active. If possible, wear long sleeved shirts or jackets, long pants, and socks when outdoors. Use insect repellent containing DEET when outdoors and apply it according to the manufacturer’s instructions. 

Prevent breeding sites:

Prevent mosquito breeding sites by removing standing water around your homeMosquitoes like to lay their eggs in standing water. Water that sits creates an ideal breeding ground for mosquitos especially between June and late August. It is important to clean standing water from all areas around your home. 

Empty containers where water collects including:

1. Changing water in bird baths weekly 

2. Empty and refill pet water bowls often 

3. Turn over items such as wheelbarrows 

4. Unclog drainage ditches 

5. Ensure rain barrels are fitted with a tight screen 

6. Clean out eaves, gutters and drains 

7. Drill holes in the bottom of containers and tire swings so water can’t collect 

8. Trim and maintain your lawn and shrubs  

9.Turn over wading pools when not in use 

Swimming Pools and Ponds: 

The water in swimming pools and ponds can provide a potential breeding location for mosquitoes if the water is allowed to remain stagnant.  

  1. Ensure proper maintenance of pools 

  2. Remove water that collects on pool and hot tub covers 

  3. Circulate water in ornamental ponds



The Town is unable to eliminate mosquitoes with our control program. The goal of this program is to reduce the biting activity to a more tolerable level where outdoor spaces can be enjoyed with personal precautions. Besides, if all the mosquitoes were destroyed, what would the bats and purple martins eat? 

Next Steps

Following the 2023 Summer pilot program staff will review the effectiveness of the program and report back to Council with a recommendation for potential future years.