Globally, there is no specific standard for testing and certifying UV sterilizer bottles, but reputable companies such as the American brand LARQ use a microbial test method based on E. coli bacteria as an indicator microorganism. In this regard, PUWA product tests have also been conducted using the same method and under controlled conditions at the University of Tehran Microbial Laboratory to allow for scientific and accurate comparisons.

The results of multiple tests showed that under completely similar conditions, the E. coli inactivation rate of PUWA product was 99.999%; while the American sample reported a value of 99.98% in its official test. These tests were repeated in several stages and even with both products in the same laboratory environment (University of Tehran Microbiology Laboratory) to ensure that the difference was not due to environmental conditions or measurement error. In all cases, the performance of PUWA product was superior to or equivalent to the global reference sample. (Appendix 1)

Since no national or international organization has defined an independent standard for UV-based disinfectant bottles, the criterion for evaluating these products in the world is the logarithmic reduction rate of the indicator bacteria E.coli in accredited laboratories. The official test report of the University of Tehran is attached as a reference for evaluating the product’s performance in this document.

The series of research, engineering design and academic tests of this product are proof that PUWA is not just a consumer product, but a scientific and localized technology. Our goal is to create confidence in end users and organizations for whom health and water quality are vital.