If you drill a well for your own household use, a shallow well might be good enough, although you still have to conform to public health water quality standards.

The standards are more stringent for water that will be used by the public — as in a hotel, for example. And they should be stricter, of course. Who would want hotel guests getting sick from contaminated water in their oceanfront rooms?
That’s just one of the questions that remain unanswered by the latest claims that two shallow wells drilled at the Trinidad Rancheria will be adequate to supply its proposed 5-story, 100-guestroom Hyatt high-rise hotel on the bluff above Trinidad Bay. The current projected demand for the hotel will be 9,500 gallons per day (at 70% capacity).