How Dirty Are Shopping Carts, Really? What the Research Shows
Shopping carts pass through dozens of hands, parking lots, food aisles, checkout lanes, and storage areas. Children sit in them, raw food packages are placed inside them, and handles are touched repeatedly throughout the day. It’s reasonable to think carts gather microorganisms, but alarming claims are often repeated without context.
Research shows shopping carts can collect substantial bacterial contamination, but detecting bacteria on a cart doesn’t mean a shopper will get sick. The findings support routine sanitation rather than sparking panic.
How Much Bacteria Has Research Found on Shopping Carts?
A frequently cited peer-reviewed study published in 2012 sampled the handles and child-seat areas of 85 shopping carts in five metropolitan areas in the United States. Researchers found bacterial counts ranging from 110 to 11 million colony-forming units on a cart. Coliform bacteria were found on 72% of sampled carts.
Researchers further analyzed the coliforms found on 35 carts and revealed E. coli among the organisms on 18 of them. The study indicated the possibility that carts exposed shoppers to enteric bacteria and that improved sanitation would reduce potential exposure.
What the Study Does and Does Not Prove
The results demonstrate that shopping carts can become contaminated, but they shouldn’t be used to make universal claims about every cart in every store. The study sampled from 85 carts, with more than half in the greater Los Angeles area, and was published more than a decade ago. The research measured microorganisms recovered on surfaces but did not prove that every organism detected had the potential to cause illness, how often infection resulted from cart contact, or the sanitation program at every retail location.
Does Finding Bacteria mean a Cart Will Make Someone Sick?
Bacteria are present throughout everyday environments, and they’re often harmless. The presence of bacteria on a surface is not the same thing as documentation of an infection risk. Illness depends upon several factors: the sort and amount of the organism, if it is viable, how efficiently it transfers to a person, whether they touch their mouth, nose, eyes, food, or another sensitive area afterward. Children, or those with health conditions, may be extra cautious, but a positive surface test isn’t a certainty of sickness.
“Shopping carts do not need to be sterile, but they do need a consistent sanitation process. Regular cleaning, appropriate disinfection, employee training, and documented procedures give retailers a practical way to manage these heavily touched surfaces.”–Jason Gardiner, CEO
Why Shopping Carts Become Contaminated
Shopping carts are high-touch objects used for many different purposes. Contamination could be from the hands of shoppers, leaking raw-food packages, children, pets, birds, parking-lot exposure, and dirty storage areas. The 2012 researchers revealed that raw food, outdoor animal sources, and contaminated hands or body contact could be contributing.
Handles receive considerable attention, although child seats, basket surfaces, cup-holders, lower racks, and cart-mounted touch screens may also gather dirt and organic material. Cleaning just the handle leaves other frequently touched areas unattended
What Should Retailers Clean and How Often?
There is no one schedule that fits every store. Cart volume, weather, storage practice, customer traffic, visible dirt, illness, and local requirements should all affect the schedule. The CDC has categorized shopping carts as high-touch surfaces that should be cleaned regularly. They’ve also outlined the importance of cleaning visibly dirty surfaces and considering adding extra decontamination where frequent use occurs.
Stores should start by removing any visible dirt or residue. Cleaning matters, as it could prevent some disinfection procedures from working because of organic material; it’s necessary for chemical disinfectants to remove it, and their instructions (surface compatibility, required time of wet contact).
A Standardized Cart Sanitation Program
A reliable program defines which parts of the cart receive treatment, how often you do your routines, and what brings additional decontamination into play. It should also define your approved items/equipment, employee protective gear, required contact times, and the process for documentation. Stores need to consider Carts returned from parking lots, visible food leakages, bodily fluids, and other unusual contaminations. Employees need to be informed about isolating carts that are more than standard for cleaning.
Can UV-C Support Shopping Cart decontamination?
UV-C may provide an extra microbial-reduction level for properly selected equipment and a validated process. Its effectiveness relies upon delivered dose, exposure, distance, surface angle, and whether it can reach the target. UV-C doesn’t remove mud, food residue, grease, or other physical soils. Carts should be cleaned before supplemental treatment begins. Handles, basket grids, wheels, nesting points, and shaded surfaces are other potential coverage obstacles that could require equipment configuration and process validation.
Research Supports Consistent Cleaning, Not Fear
Shopping carts aren’t sterile, and research proves several will hold high bacterial levels. Though dramatic comparisons to toilets, phones, or other objects often omit differences between testing practices, surface area, location, and the way the samples were processed. The practical solution is a repeatable sanitation program, supported by employee training and documentation. Shoppers may take advantage of their available cart wipes and wash their hands before eating or touching their face. Reach out to the professionals at Big Sky Decon for more information about the cleanliness of shopping carts and how UV-C can help keep them cleaner.
FAQs: Are Shopping Carts Really That Dirty?
Q: Are shopping cart handles dirtier than toilet handles?
A: Some studies have reported higher bacterial levels on carts than on some other publicly used surfaces, but they must be placed in context. Comparisons aren’t indicative of where the objects were tested, surface area, or method of lab testing. A catchy phrase isn’t a guarantee that all carts are dirtier than all bathroom surfaces.
Q: Should shoppers wipe down a cart before using it?
A: Using a provided store wipe will lower the contamination on the areas it’s applied to if the product is used properly. Shoppers should follow wipe instructions and focus on hand and child areas; it’s still beneficial to wash their hands since they will touch other surfaces as well.
Q: Is cleaning a cart the same thing as disinfecting it?
A: No. Cleaning physically removes dirt, residue, and several germs from a surface. Disinfecting uses a product or process to kill specific microorganisms that remain after cleaning has taken place. The CDC advises cleaning before sanitizing or disinfecting because of the impact dirt has on the effectiveness of treatment.
Q: Can stores guarantee that a sanitized cart is germ-free?
A: No practical process is capable of guaranteeing that a shopping cart will be completely germ-free when in use. It would simply be recontaminated as soon as someone touches it. A proper sanitation process should be able to document its sanitation efforts accurately.