Why do you think there are so few cases of private water supply in the world?

There are very few cases of private water supply in the world because water is an essential amenity; water supply is a public facility that every government must provide to all citizens of a State. In cases where water supply was placed in the hands of private companies, the prices of water rose, making it unaffordable to the masses. This resulted in riots, protests and violent demonstrations in countries like Bolivia. Hence, it has been deemed best that the government must handle water supply services.