First, you need have an water resource. And do an water quality report to fit the suitabel water purification machine. The most easy way is use RO water purifier to removed everything of the raw water and producing purified water.
Second, you can buy one 5 gallon water bottling plant. It included 6 set bottling machine as below.
Third, you can propaganda your bottled water and selling your bottle water. Most people like drinking 5 gallon water. Author and most people i will suggestion it. Because it is the cheapest way to drinking fresh pure water. The small bottled water cost high and sometimes family or business drinking water is not convenient. Directly drinking purified water equipment need frequency change filter which most of them thinking it is never need change filter so that lead directly drinking equipment water bad.

The world most big profit business is been hold by big brand. But for 5gallon safe drinking water. Every bottle is heavy. Dilivery cost big and take time. Fresh safe pure water is love by customer. Some small town and city population is not very big. So that big brand no willing to build an factory there. For big branch, even an manager salary is over hundreds thousand dollar.
And small city and town, not only salary will increase, but also population will increase. So that safe water inquiry will increase.

Good way to bottling water for university
Can be very profitable; especially in large volume.
The 5gallon bottles can reuse for 2year.
Much better use of plant space as the units are compact.
Environmentally friendly, No pollution at all.
Much lower cost to set up plant.
Street sellers will sell to create jobs.