What are the hygiene risks of porous stone surfaces in outdoor garbage bins?

Porous stone surfaces, while aesthetically pleasing for outdoor garbage bins, present significant hygiene risks. Their inherent microscopic pores and rough texture trap moisture, organic debris, and bacteria. This creates an ideal environment for pathogenic microorganisms like E. coli, Salmonella, and mold to proliferate. Unlike non-porous materials, these surfaces are difficult to sanitize completely; cleaning agents often cannot penetrate deep pores, allowing bacteria to survive and regrow. Trapped moisture leads to persistent odors and accelerates material degradation. Furthermore, accumulated waste residues can attract pests. Regular and rigorous cleaning is essential, but the fundamental risk lies in the material's inability to be effectively disinfected, potentially compromising surrounding area hygiene and public health.