How to increase the PH levels of MCD supplied water with TDS 200, post UV and filtration in New Delhi ?

HOW CAN A PH LEVEL OF A MCD SUPPLIED WATER CAN BE INCREASED POST UV AND FILTERATION HAVING TDS 200

ALSO HOW CAN WE INCREASE THE ALAKANITY OF THE SAME.....

I ASSUME HIGH LEVELS OF PH AND ALKANITY ARE PROVED GOOD FOR METABOLISM AND DIGESTION....

NEED INPUTS FROM THE EXPERTS

THANKS IN ADVCANCE

REGARDS

J