Water quality is confirmed by conclusions based on the annual research conducted by the Ukrainian Scientific-Research Institute of Medical Rehabilitation and Balneology (Odessa).

Constant samples taking and examination of already PET bottled water by specialists of Kosiv District Sanitary and Epidemiological Station allow us to conclude that water from the Pistyn spring bottled by Tyrlych LTD is of high quality and meets the established standards.

Specialists of the Ivano-Frankivsk Research and Production Center of Standardization, Metrology and Certification examinated Pistynska Dzherelna water for the presence of GMOs. According to the results of the tests GMO was not detected.

The annual mandatory certification that Pistynska Dzherelna water undergoes in the bodies of state standardization and certification is a proof that Pistynska Dzherelna water produced by Tyrlych LTD is of high quality.