“Compostable” and “biodegradable” do not tell you where a trash bag belongs. The answer depends on its exact certification, contents, and the rules of the composter or collector receiving it.
What Compostable Means
FTC guidance says a compostable claim needs evidence that the whole item becomes usable compost safely and in about the same time as the material composted with it.
A commercial-compostable certification applies to tested commercial conditions. It does not establish that the bag will break down in your backyard bin.
BPI now offers Commercial Only and Commercial and Home certifications. Its home certification covers properly managed home bins as well as commercial facilities.
Certification still does not require a composter to take the bag. BPI notes that facilities may refuse certified items while managing contamination and accepted feedstocks.
What Biodegradable Means
Biodegradable describes an ability to break down under some conditions. Without a named standard, timeframe, and disposal setting, it does not tell you whether a bag belongs in compost.
FTC guidance says an unqualified degradable claim is inappropriate when customary disposal will not let the whole product return to nature within a reasonably short period.
A biodegradable label does not make a bag recyclable. Keep these bags out of plastic-film collection unless the program explicitly names them.
Start With the Receiver
Ask your curbside collector, drop-off site, or composter whether it accepts compostable bags. Use the exact liner type or certification in its current rules.
The contents matter too. A certified bag does not make general trash, diapers, pet waste, packaging, or other prohibited material compostable.
For home compost, use only a bag with a credible home-compost certification and follow its scope. A commercial-only mark is not a home-compost instruction.
If the program rejects all bags, use a washable pail, accepted paper liner, or another approved option.
Shop by Receiver Fit
Choose the program before the bag. Check the mark on the bag itself, then confirm the exact product in the certifier’s current catalog when possible.
Broad claims such as “green,” “earth friendly,” or “biodegradable” do not establish acceptance or a better result in your actual disposal route.