Beware, Poland Spring (owned by Pepsi) in New England famously bored a well in a property they bought -- that had previously been a paint factory. Because of the success of food regulation in the USA it took a TV station to find this out.
The previous use of the surface site doesn't necessarily make the aquifer unusable. It would be much more damning if their water was tested and found to have higher than normal levels of volatile organic compounds or whatever.
