The pH value of milk and milk products is one important parameter when checking the quality of your milk. E.g., the pH value of fresh milk should lie between 6.6 - 6.8. A higher pH value indicates a mastitis infection in the cow and a pH of below 6.5 indicates towards acidification of the sample.
in Bavarian ex-farm milk, the medium pH is around 6.7 and this is regarded as the "natural" pH of milk from German Simmental and German Brown Swiss cows.