What Goes in the Green Bin: Canada's Organics Stream Explained

Food waste is roughly a third of what Canadian households throw away. Buried in landfill it decomposes without oxygen and releases methane, a greenhouse gas over 25 times more potent than carbon dioxide. Collected separately, the same scraps become compost or renewable natural gas — which is why organics programs have spread from early adopters like Halifax and Toronto to most major cities, and why Metro Vancouver banned food scraps from garbage outright in 2015.

The household payoff is immediate: with wet waste gone, the garbage bin stops smelling, and many cities use that to justify biweekly garbage pickup — the weekly green bin becomes the collection that actually matters.

The core list is the same from coast to coast. All food is in, cooked or raw:

• Fruit and vegetable scraps, peels and cores.
• Meat, poultry and fish — including bones and shells.
• Dairy, eggs and eggshells, bread, rice, pasta and baked goods.
• Coffee grounds, paper coffee filters, tea bags and plate scrapings.

Most programs also take food-soiled paper that cannot be recycled: napkins, paper towel, pizza box grease spots and paper plates without plastic coating. Yard waste — grass, leaves, small branches — is accepted in cities that combine the streams, such as Calgary's green cart and many Quebec brown bin programs, while others run separate seasonal yard waste collection.

The number one rule across Canada: no plastic of any kind in the green bin. That includes bags, wrap and packaging, and — in almost every program — products labelled 'compostable' or 'biodegradable'. Industrial composting conditions vary and most Canadian facilities cannot reliably break those items down, so they are screened out and landfilled anyway. Toronto accepts plastic bags as liners because its system removes them; most other cities do not. Check your local rule before buying anything.

• No pet waste or kitty litter in most programs (some, like Toronto, allow it — verify locally).
• No diapers or sanitary products, ever.
• No liquids, cooking oil or grease — wipe pans with paper towel and bin that instead.
• No soil, sod or large branches; yard waste has size limits even where it is accepted.

Toronto: weekly green bin pickup with garbage biweekly. Unusually, plastic bags are permitted as liners — the processing system removes them before digestion. Pet waste is accepted.

Calgary: the green cart takes food and yard waste together, weekly in summer and biweekly in winter. Only certified compostable or paper liners are allowed.

Metro Vancouver: food scraps are banned from garbage, so the organics stream is effectively mandatory; many buildings use green bins or chutes with food-soiled paper accepted and plastic strictly out.

Quebec: the bac brun rollout is bringing weekly or biweekly brown bin collection to municipalities across the province, typically accepting food plus leaf and yard material, with paper bags as the standard liner.

Ottawa: weekly green bin with a broad accepted list, including pet waste and soiled paper, and plastic bag liners permitted.

A small kitchen catcher by the counter, emptied every two or three days, is the standard setup. Where liners are allowed, paper bags and newspaper are the universally safe choices; certified compostable bags only where your city names them. A sheet of newspaper in the bottom of the bin absorbs liquid, and a sprinkle of baking soda handles summer odour.

Winter is the uniquely Canadian challenge: wet scraps freeze solid to the bin and trucks cannot empty it. Line the bin bottom with newspaper or cardboard in cold snaps, drain wet scraps before binning them, and set the bin out on its side if frost is forecast. In summer, freeze meat and fish scraps in a paper bag until collection day, and keep the lid latched against raccoons — they are the true green bin inspectors of Canadian suburbs.

Green bin material is processed two ways in Canada. Composting facilities shred, screen and cure it into soil products sold to farms, landscapers and residents — many cities give finished compost back at spring events. Anaerobic digesters seal the scraps in tanks, capture the methane as biogas for heat, electricity or renewable natural gas, and still produce fertilizer from what remains. Either way the nutrients return to use instead of generating landfill gas for decades — and a free BinMinder reminder makes sure your bin is out for every weekly pickup.