What should be TDS of drinking water? The TDS of inlet water is 500 ppm and the outlet TDS is 34 ppm, is it safe for drinking?

Hello,

I need to understand what the TDS of drinking water should be. Presently I am using Aquasure RO system.

The inlet water TDS is 500 PPM and out come is 34 PPM. Is it good for drinking or advice how much PPM is good for drinking