Rodenticide rules in Canada for domestic and commercial baits
A rodenticide is a rat or mouse poison. In Canada, its registration, marketing class and approved label decide who may sell it, who may use it and how.
Rodenticide rules in Canada
A rodenticide is a pest control product used to kill rodents such as rats and mice. In Canada, a rodenticide may be sold or used only within its current Health Canada registration, its marketing class and its approved label, with provincial rules on top.
The active ingredient alone doesn't establish who may use a bait or where. Check the marketing class in Health Canada's product search, then read the approved label, before supplying or using it.
Rodenticide active ingredients by group
Health Canada's rodenticide questions and answers sort the actives in its rodenticide mitigation decision into three groups.
| Group | Active ingredients |
|---|---|
| First-generation anticoagulants | warfarin, chlorophacinone, diphacinone |
| Second-generation anticoagulants | brodifacoum, bromadiolone, difethialone |
| Non-anticoagulants | bromethalin, zinc phosphide |
The table names categories in that decision, not products registered today, and it doesn't say which actives a homeowner can buy. Warfarin rat poison, for example, is a first-generation anticoagulant, but whether a given warfarin bait is available to the public depends on that product's own registration.
Watch the spelling. Bromadiolone is a second-generation anticoagulant. Bromethalin is a different chemical and is not an anticoagulant at all.
Domestic and Commercial classes
Health Canada describes Domestic products as consumer products for use in and around homes. Commercial products are for specified commercial activities.
Its Commercial-class factsheet, issued in July 2024, limits Commercial rodenticides to certified pest-control operators, farmers and people authorized under government-approved programs. Provincial licensing rules still apply, so being a farmer does not settle every question on its own.
Brodifacoum, bromadiolone and difethialone in Domestic products
The mitigation decision prohibits second-generation anticoagulants in Domestic-class products. So brodifacoum, bromadiolone and difethialone can't be in a consumer bait in that class.
The prohibition applies to Domestic-class products. For a Commercial product, check the current registration, the permitted users, the label and provincial law.
Mouse poison blocks and rat bait blocks
For Domestic products covered by the decision, Health Canada requires block or solid formulations. Loose meal, treated whole grain, pellets, liquid baits and concentrates that the user dilutes are prohibited in those products. A mouse poison block or a rat bait block still has to match that product's own label.
Rat poison for bait stations
The mitigation decision requires covered Domestic baits to be packaged with a bait station and always used in one. Health Canada's consumer advice on rats and mice also says poisoned bait must go in a tamper-proof station anywhere children and pets can reach it.
Station tiers for Commercial products
The Commercial-class factsheet sets out station tiers by where the station goes. These tiers come from the Commercial guidance. Don't assume they apply to Domestic stations.
| Tier | Placement | What the station must do |
|---|---|---|
| Tier 3 | Indoors, reachable by children but not by pets or livestock | High-strength material that children cannot destroy, and an entrance they cannot reach through |
| Tier 2 | Indoors, reachable by children and by pets or livestock | The Tier 3 requirements, plus resistance to destruction by non-target animals and an entrance they cannot reach through |
| Tier 1 | Outdoors above ground, where it can be reached | The Tier 2 requirements, plus resistance to bad weather |
Outdoor above-ground bait placements must be in a station, tamper-resistant where children, pets, livestock or wildlife can reach it, with the approved label deciding the requirements.
Placement distances on farms
Health Canada's agricultural guidance says structural placements are generally within 15 m of buildings. Along fence lines, it describes placements up to 100 m out when the station is securely attached to the fence or the ground. It also recognizes some inaccessible spots, such as burrows, between walls and inside stacks of feed bales, where a station may not be needed. A farm residence counts as a residential setting.
How to check a rodenticide registration
The approved label is legally binding. Using a product in a way the label doesn't allow breaks the Pest Control Products Act, and the Commercial factsheet says the label prevails over its general guidance.
Start at Health Canada's Public Registry. Then use the product search and the label search. For each product, check:
- the exact registration number
- whether the record is current or historical
- the registration status and the expiry date
- the marketing class on the record (Domestic, Commercial, Restricted, Manufacturing concentrate, Technical active, or another class)
- the approved PDF label
Then read the label for the target pest, the sites, any user restrictions, the formulation, the station requirements and the placement terms. A product labelled for mice only is not approved for rats. The active ingredient alone does not establish those permissions.
The label search can return cancelled products. Its disclaimer says the search results don't replace the official PDF label.
Two records checked in October 2026 show what that lookup returns, not how to use the bait. The register listed Tomcat Rat Killer II, registration 32033 and Tomcat Rat Killer, registration 31969, both as Domestic, Current, Full Registration, expiring 2030-12-31. The names are similar, but the registration numbers are different. For 32033, the English label link opened an email request form instead of a PDF. Get that approved label before you rely on the product.
Re-evaluation of rodenticides
Health Canada's 2026-2031 work plan (REV2026-03), dated 30 June 2026, targets March 2027 for a proposed re-evaluation decision on the rodenticide cluster. The cluster covers brodifacoum, bromadiolone, bromethalin, chlorophacinone, diphacinone (free form or sodium salt), warfarin (free form or sodium salt), zinc phosphide and difethialone. A proposed decision goes out for consultation. It is not a final decision or a ban, and the work plan says target dates may change.
Provincial rules in British Columbia
Federal registration doesn't authorize every use in every province. In British Columbia, revised provincial restrictions on second-generation anticoagulants took effect on 21 January 2023. The 2022 announcement described limits on sale and use by the public and by most commercial and industrial operations. It retained access for selected essential services, such as hospitals and food production, subject to certification or licensing, site-specific integrated pest management and record keeping. Check BC's current rules before relying on an exemption.
RegAffairs AI's answer on Canadian rodenticides covers registration and bait-use restrictions.