What is the pH of Ultra Pure water?
The pH scale is a negative logarithm scale that represents the number of Hydrogen ions present. Measuring the pH of very “pure” water is problematic at best. The measurement of water with a TDS of 5 or less e.g.; distilled and Ultra Pure Water easily confuses most testing equipment. That being said, using simple chemistry and math our water has to be 7 (i.e. neutral). However, clean or “pure” water exposed to the atmosphere will absorb carbon dioxide until equilibrium is reached. Carbon dioxide acidifies the water thus lowering the pH to around 6.8. Our bodies contain a wide range of pH solutions. For example, stomach acid is a 1.6, saliva is 6.5 to 7.7, arterial blood is 7.4 [Structure and Function of the Body 13th edition, by Thibodeau & Patton] We need to be more concerned with the interaction within our bodies and the by-product left behind by what we ingest. If I want my body to be more alkaline I can drink Apple cider vinegar which is very acidic (a pH of 3) thus causing my body
