The main reason for the differences in price is because the milk union decides the price based on its profit, expenditure, facilities and projects it has taken up.
A milk farmer in Karnataka. (KMF official website)
Milk procurement prices vary across milk unions in Karnataka, despite KMF selling it at a uniform price. Each of the 15 milk unions has its unique considerations for prices and this complex landscape has led to varying procurement prices, with some unions paying as high as ₹33.40 per litre and others paying as low as ₹29.10 per litre.