HealthPhoto: Prabhat KhabarStudy Finds High Bacterial Load in Water Bottles
A 2024 study published in the Journal of Pharmacy and Bioallied Sciences examined 30 water bottles—15 PET plastic and 15 stainless steel. PET bottles had an average microbial load of 68.8 CFU/ml, while steel bottles had 35.4 CFU/ml. Microbial load increased by 70% in PET and 23% in steel bottles within 3 hours of use. Cleaning reduced the load to 11.2 CFU/ml on average. CFU indicates colony-forming units of microbes.
Prabhat Khabar·


