That's an excellent question! As someone who's managed commercial properties for over a decade, I've had plenty of hands-on experience with this very scenario. The short answer is: most quality outdoor trash bins handle power washing remarkably well when done correctly.
Modern outdoor bins, especially commercial-grade ones, are specifically engineered to withstand harsh cleaning methods. The heavy-duty plastics (like polyethylene or polypropylene) and powder-coated metals used in their construction can absolutely tolerate pressure washing. I've personally cleaned hundreds of bins using industrial pressure washers set at 1500-2000 PSI without causing damage.
That said, there are important considerations. Always maintain a safe distance of about 12-18 inches between the nozzle and the bin surface. Use a wider spray pattern rather than a concentrated stream, and avoid directing water at seams or lids where it could force moisture into unwanted areas. For bins with decals or painted logos, be extra cautious as high pressure can peel these off over time.
The real concern isn't typically the pressure washing itself, but rather what happens afterward. Proper drainage is crucial - bins must be positioned to completely dry to prevent mold or mildew formation inside. Also, be mindful that repeated high-pressure cleaning might eventually cause fading on colored bins, but this is purely cosmetic and doesn't affect functionality.
From my experience, regular power washing actually extends the life of outdoor bins by removing corrosive substances and preventing bacterial buildup. Just remember to use common sense - if a bin is already cracked or damaged, pressure washing might exacerbate those issues. Otherwise, feel confident that your bins are designed to handle thorough cleaning.