The water coming from all of the taps is drinking quality water, from a drilled well. It is tested regularly in accordance with drinking water standards that have been legislated in Ontario following the Walkerton disaster. Before paying for private water tests as per regulation, and since, I have tested my water through the public health system, as a resident. The water in my house has the same origin as the water in the campground.
FYI, the bottled water industry is not regulated.
Also, consider this. The bottles you bring the water in go to landfill, unless you take them back to your tax base. Our tax base is not large enough to support a recycling program, as well as keep roads in shape for use. Why is the amount of garbage/camper steadily increasing here, instead of decreasing? There are educational programs galore. So...before you buy more bottled water, consider refilling the receptacles you already have.