Sorting at home works best when it mirrors how your collection program is structured. In Canada that structure is municipal: a container accepted in aalifax may be refused in Calgary because the two cities send material to different processing facilities. The starting point is therefore your own municipality's accepted-items list, not a national rule.
Separate by material behaviour, not by appearance
Processing facilities sort by what a material does on their equipment, not by what it looks like to us. Four broad groups cover most household recyclables:
- Paper and cardboard — newsprint, office paper, boxboard such as cereal boxes, and corrugated cardboard.
- Rigid containers — bottles, jugs, tubs, and jars that hold their shape.
- Glass — bottles and jars, sometimes collected separately at depots rather than at the curb.
- Metal — aluminium and steel cans, and clean foil where accepted.
Why clean and dry matters
Residue is the most common reason a load is downgraded. A jar with dried sauce can usually be rinsed in seconds; a container coated in grease often cannot be recovered and contaminates the paper it touches. The practical standard most programs describe is "empty, rinsed, and reasonably clean" rather than spotless.
The two-second rule
If you are unsure whether an item belongs in recycling, a quick check is whether it is a single, clean material. Mixed-material items, such as a foil-lined paper pouch, are the ones most likely to belong in the garbage stream under current programs.
How to read a municipal accepted-items list
- Find the authority. Search for your city, region, or county collection page. Many use an online "what goes where" lookup tool.
- Check the format note. Confirm whether your program is single-stream or asks you to keep paper separate from containers.
- Note the exceptions. Plastic film, foam, and coffee cups are common exceptions that often have separate drop-off instructions.
- Re-check seasonally. Accepted lists change as facilities and contracts change, so a rule from two years ago may be out of date.
Items people get wrong
A few categories cause most of the confusion at the curb:
- Plastic bags and film tangle sorting machinery and are frequently excluded from curbside bins, with store drop-off offered instead.
- Shredded paper is too small for many optical sorters and may need to be bagged or composted depending on the program.
- Black plastic is hard for some optical scanners to detect and is refused in certain programs.
For broader context on materials management policy in Canada, the federal overview from Environment and Climate Change Canada is a useful reference, and provincial stewardship bodies such as the Recycling Council of British Columbia publish region-specific guidance.