That's a great question, and one that many residents might wonder about when they see those massive trash cans in parks, downtown areas, or at public events. The short answer is yes, city workers can replace the liner bags, but the process is a bit more involved than simply swapping out your kitchen trash bag. "Easily" depends on the specific design of the can and the tools and procedures the workers have.
For standard large bins, often called "litter barrels" or "park cans," the process is generally straightforward for trained crews. These bins typically have a fixed inner rim or hooks from which a heavy-duty polyethylene liner bag is hung. Workers usually carry rolls of pre-sized liner bags on their service vehicles. The old bag is simply lifted out—sometimes requiring a bit of maneuvering if it's very full—and the new one is unfurled and secured over the rim. It's a routine part of their collection route.
However, for the largest containers, like those with capacities of 50 gallons or more, or those with specialized anti-theft or animal-proof lids, the task can be more physical. These liners are much larger and heavier, especially when wet. Workers might use techniques like tilting the can to access the bag's edges better or employing simple tools like grabbers. In some modern, high-efficiency systems, the entire inner bucket holding the liner is removable and swapped out at the depot, minimizing on-site bag changes.
The key to making it "easy" is proper training, having the right equipment—like heavy-duty gloves and sometimes two-person teams for the biggest cans—and using quality, tear-resistant liners designed for municipal use. So, while it's a standard part of keeping our cities clean, it's a task that combines simple steps with the physical demands of public works to ensure it's done quickly and effectively.