How Health Canada's PMRA regulates pest products
Every pest control product sold or used professionally in Canada must be registered with Health Canada's Pest Management Regulatory Agency (PMRA) under the Pest Control Products Act. Registration requires the manufacturer to submit toxicological data from independent studies demonstrating safety at the proposed application rates, environmental fate data, residue data for food-use products, and efficacy data demonstrating the product actually controls the target pest. PMRA registration numbers appear on every product label (format: Registration No. XXXXX). When a BC-licensed pest applicator uses a product, you can look up its complete label — including active ingredients, application rates, safety precautions, and first-aid information — at the Health Canada Pesticide Label Search database. The registration process applies a 10× safety factor above documented no-effect levels when establishing residential application rates. This means the registered residential rate is already 10 times below the threshold where any effect on humans is detectable in laboratory testing.
Active ingredient classes used in BC residential pest control
- Synthetic pyrethroids (cypermethrin, permethrin, deltamethrin, bifenthrin): the most common professional insecticide class. Structurally derived from natural pyrethrins found in chrysanthemum flowers. Low mammalian acute toxicity at residential application rates. Break down in sunlight and on most surfaces within days to weeks. Higher aquatic and fish toxicity — applicators avoid treating near drains and water features. Cats more sensitive than dogs at higher exposure levels — formulation and ventilation protocols adjust.
- Insect growth regulators (IGRs — pyriproxyfen, hydroprene, methoprene): disrupt juvenile hormone systems specific to arthropods. No comparable hormone system in mammals. Very low mammalian toxicity. Used in cockroach, flea, and fly control; highly effective at preventing larval development.
- Neonicotinoids (imidacloprid, thiamethoxam): nicotine-derived systemic insecticides. Lower mammalian toxicity at residential rates. Significant bee toxicity concern in outdoor applications — Wild Pest restricts outdoor neonicotinoid use and does not apply near flowering plants.
- First-generation anticoagulant rodenticides (chlorophacinone, diphacinone, warfarin): only anticoagulants now legal in BC for most residential use following the 2023 SGAR ban. Used in tamper-resistant bait stations. Antidote (vitamin K1) is effective if administered early. Significantly lower secondary poisoning risk than second-generation anticoagulants.
- Cholecalciferol (vitamin D3 analog): non-anticoagulant rodenticide. Works differently from anticoagulants; no antidote. Used where anticoagulant resistance is a concern.
- Borate-based products (boric acid): very low mammalian acute toxicity. Used in cockroach baits and some ant treatments. Effective gel formulations available.
The SGAR ban: what changed in BC in 2023
British Columbia became the first province to effectively ban second-generation anticoagulant rodenticides (SGARs) — brodifacoum, bromadiolone, difethialone, difenacoum — for most non-agricultural pest control applications. The ban was driven by documented secondary poisoning of BC's raptor and carnivore populations: owls, hawks, cougars, bobcats, and coyotes were testing positive for SGAR residues at rates exceeding 70% in Metro Vancouver wildlife studies. First-generation anticoagulants (FGARs) remain legal with tamper-resistant stations. Cholecalciferol remains legal. The practical implication: BC professionals use FGARs and cholecalciferol for residential rodent control. FGAR residues clear from tissue faster (lower bioaccumulation) and have lower secondary poisoning potential. See our full article on [rodenticide safety and BC regulations](/guide/rodenticide-safety-bc-sgar-ban) for the complete picture.