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Post-consumer waste is a waste type produced by the end consumer of a material stream; that is, where the waste-producing use did not involve the production of another product.
Quite commonly, it is simply the garbage that individuals routinely discard, either in a waste receptacle or a dump, or by littering, incinerating, pouring down the drain, or washing into the gutter.
Post-consumer waste is distinguished from pre-consumer waste, which is the reintroduction of manufacturing scrap (such as trimmings from paper production, defective aluminum cans, etc.) back into the manufacturing process. Pre-consumer waste is commonly used in manufacturing industries, and is often not considered recycling in the traditional sense.
Post-consumer waste consists of:
- parts that are not needed, such as fruit skins, bones in meat, etc.
- undesired things received, e.g.:
- advertising material in the mailbox
- a flyer received in the street without having the opportunity to refuse
- dust, weeds, fallen leaves, etc.
- things one no longer needs, e.g. a magazine that has been read, things replaced by new versions, clothes out of fashion, remaining food that one cannot keep or does not want to keep
- broken things, things no longer working, spoiled food, worn-out clothes, clothes which no longer fit
- outgrown items toys, clothing, books, schoolwork
- disposables such as Kleenex and finished batteries
- human waste, waste of pets, waste water from various forms of cleaning
- "post-life waste"
- One's body or ashes
- Things people do not want and cannot sell
- Broken/unused cars
- items that cannot be used
Legal issues 
In many countries, such as the United States, there is no reasonable expectation of privacy in post-consumer waste once it leaves the consumer's home. Anyone can search it, including the police, and any incriminating evidence recovered can be used at trial. This doctrine was established in The California v. Greenwood case, in which the U.S. Supreme Court held that there is no common law expectation of privacy for discarded materials. This has since led people to argue the legality of taking post-consumer waste for salvage value.
See also 
- "Legality of Scrapping Metal". Retrieved 2010-10-04.