Yes, we do follow stringent standards for testing.
For instance, IS 9845 (1998) is for determining the migration of plastic and food-grade materials, IS 3025 (P10)-1984 is the method used for measuring the turbidity of all kinds of water, IS 3025 (Part 26): 2021 is the method for determining residual chlorine in all types of water and IS 10500: 2012 for all requirements and procedures of testing drinking water.