Health & Science Can bacteria be killed by sunlight? February 4, 2026 by Tanp | Leave a Comment Can bacteria be killed by sunlight? Yes, sunlight can kill bacteria, primarily through its ultraviolet (UV) radiation. UV rays damage the DNA of bacteria, rendering them unable to reproduce and effectively killing them. This natural disinfection method has been used for centuries to purify water and surfaces. How Does Sunlight Kill Bacteria? Sunlight kills bacteria […] Read more ยป