The high-altitude source is less affected by atmospheric pollution and is less likely to be polluted.

Sodium

A low sodium value in mineral water helps the hydration process of the human body.

Nitrates -

They are considered pollutants in the water.

The amount of nitrates in water must not exceed 50 mg / L

Residue at 180 ° 

The lower it is, the more "light" the water is, that is, it has fewer minerals.