The most common issue with recycling plastic grocery bags is that they tangle and jam the sorting machinery at recycling facilities. Plastic bags cannot go in your curbside recycling bin for this reason, even though the plastic itself is technically recyclable. When bags end up in the regular recycling stream, they wrap around conveyor belts, rollers, and gears, forcing facilities to shut down for manual removal.
How Bags Jam Recycling Equipment
Recycling facilities, known as material recovery facilities or MRFs, use spinning drums, conveyor belts, and rotating screens to sort materials by size and type. Plastic bags are lightweight and flexible, which means they don’t move through this equipment the way rigid containers do. Instead, they wrap around rotating parts and bind up the machinery.
Workers at these facilities can spend hours each day cutting tangled plastic film off equipment. Every time they do this, the entire sorting line has to stop. That downtime reduces the facility’s capacity to process legitimate recyclables and creates a safety hazard for the workers doing the removal. Plastic bags are one of the most common “tanglers,” a category that also includes clothing, rope, wire, and hoses.
This is why nearly every municipal recycling program in the United States explicitly excludes plastic bags, film, and wrappers from curbside collection. New York City’s recycling rules, for example, list bags and all kinds of plastic film as items that cannot be recycled through the city’s program.
Where Plastic Bags Can Actually Be Recycled
Plastic grocery bags are recyclable, just not through your curbside bin. The correct channel is a store drop-off program. Many grocery stores and retail chains have collection bins near their entrances where you can return clean plastic bags and other flexible film packaging.
These programs accept more than just grocery bags. You can typically include bread bags, produce bags, dry cleaner bags, zip-close bags, bubble wrap, shipping air pillows, cereal box liners, and case wrap. The general rule: if the plastic stretches when you pull it and is marked with a resin code 2 or 4, it qualifies. Items should be clean and dry before drop-off. A quick wipe with a dry cloth to remove any residue is enough.
Not all flexible plastic qualifies, though. Wrappers made from multiple types of plastic layered together, or film backed with foil, can’t be separated during recycling and should go in the trash. Chip bags, candy wrappers, and many snack packaging fall into this category.
What Happens to Bags That Get Recycled
Plastic film collected through store drop-off programs follows a completely different path than your curbside recycling. Stores bundle the collected bags and ship them to specialized processors rather than sending them to a MRF. One of the largest end markets is composite decking. Trex, a major decking manufacturer, makes its boards from a blend of 95% reclaimed wood and plastic film. Distribution centers bale the collected bags into 1,000-pound blocks, and once 40 bales accumulate, they’re shipped to a manufacturing plant where they become raw material for deck boards.
This is a genuinely useful second life for the material, but it depends entirely on keeping the collected film clean and free of contamination. Food residue, moisture, or mixed-in materials that don’t belong can cause an entire batch to be rejected.
How Bag Bans Have Complicated Things
A growing number of cities and states have banned single-use plastic grocery bags entirely, which might seem like it would simplify the recycling picture. The reality is more nuanced. Research examining the impact of New York State’s plastic bag ban on retail return recycling programs found that removing grocery bags from the collection stream actually increased contamination rates by 1.4 to 2.8 times.
The reason is a concentration effect. Grocery bags were the most recognizable item in store drop-off bins. They were easy for people to identify correctly, and they made up a large share of the collected volume. Once bags disappeared from the mix, the remaining film included a higher proportion of items that people weren’t sure about, and more non-recyclable materials slipped in. The result was that the film still being collected became less pure and less valuable to processors.
The Practical Takeaway
If you still use plastic grocery bags, the best thing you can do is keep them out of your recycling bin and return them to a store drop-off bin instead. Putting them in curbside recycling doesn’t just fail to recycle them. It actively harms the recycling process for everything else in your bin by shutting down sorting equipment and diverting workers from their jobs. A single bag that wraps around a conveyor belt can halt processing for an entire facility.
If your area has banned plastic bags and you have other types of plastic film at home, check for the resin code and the How2Recycle label before dropping anything off. Clean, correctly sorted film has a real market. Contaminated or misidentified film ends up in landfill anyway, just after wasting everyone’s time along the way.