Aarey Milk Colony is a conglomeration of private buffalo dairy farms situated in Goregaon a suburb of Mumbai. It covers an area of some 35000 acres and was donated to the state of Maharashtra by Mr Aarey the founder of Aarey Dairy's in 1949. The Buffalo produce on average 30 litres / day . The milk produced is 'loose' ie raw milk that is sold direct or wholesale to shopkeepers and sweet martes without any additional treatment save for chilling by ice.
The higher fat content of 7% makes it ideal for sweet manufacture but also more expensive than cow's milk 35-40 INR / litre as opposed to 25 INR/litre. As a result it is not considered to be as healthy as the former unless that is you are especial needful of unsaturated fats.