Your RO system is good, but the last time the membrane was checked? That's eight months back. You are drinking water that is filtered and not purified. There is a perilous difference.
RO maintenance that the residents of Greater Noida bypass is not just maintenance. It is the difference between contaminant removal and visible particle removal. The water from your system seems to be okay since water is coming out of it. Whether or not it is safe to drink is a completely different matter.