What an established risk area means
Public Health Ontario defines an established blacklegged tick risk area as a 20 kilometre radius around a location where blacklegged ticks were found during both spring and autumn drag sampling. Hastings Prince Edward is within that designation. The radius is a surveillance construct, not a fence — ticks are carried widely by migratory birds and can turn up outside mapped areas.
- Based on spring and autumn drag sampling
- Mapped as a 20 km radius
- Updated annually by Public Health Ontario
- Ticks can occur outside mapped areas
Where ticks actually are on your property
Blacklegged ticks need humidity and cover. They are concentrated in the transition zone where mown lawn meets woods, in leaf litter, in tall grass and in ground cover — not in the middle of a maintained lawn in full sun. This is why yard modification is effective: most of a typical property is already low risk.
- Wooded edges and brush lines
- Leaf litter and ground cover
- Tall grass and unmown margins
- Stone walls and woodpiles
Habitat modification comes first
Before any treatment, the physical changes do most of the work. Widening the mown margin, clearing leaf litter, and creating a dry barrier between lawn and woods reduces the habitat ticks depend on and limits how far they move into the used part of the yard.
- Keep grass short in used areas
- Remove leaf litter and brush piles
- Create a dry gravel or mulch border at the bush line
- Move woodpiles and play equipment away from edges
When property treatment makes sense
Perimeter applications target the wooded edge and transition zones rather than the whole yard, and are timed to tick activity. This suits properties with young children, dogs, or heavy use of areas adjacent to bush. Treatment runs $250 to $500 per application and is usually repeated during peak season.
- Perimeter and edge applications
- Timed to spring and autumn activity
- Repeated during peak season
- Best combined with habitat work
Seasonality
Adult blacklegged ticks are active in spring and again in autumn, including on mild days above freezing. Nymphs, which are tiny and responsible for a large share of transmission because they are so easily missed, are most active in late spring and early summer. Risk is not confined to midsummer.
- Adults active spring and autumn
- Nymphs peak late spring to early summer
- Activity continues on mild winter days
- Peak caution period is April through July
What belongs to public health, not to us
Tick removal from a person, testing, symptoms and treatment decisions are matters for Hastings Prince Edward Public Health and your clinician. We work on the property. If you have been bitten or are unwell, contact a health professional rather than a pest control company.
- Contact a clinician about bites or symptoms
- HPE Public Health provides local guidance
- Public Health Ontario maps risk areas
- Emerald handles yard habitat and treatment only