Here's  a simple truth about drilling for oil and gas: Nearly every well ever drilled passes through a water table, and if not constructed properly, all of them can pollute drinking water.

This is a fact that drillers have addressed for decades, long before hydraulic fracturing of shale rock became possible or popular. In the long history of oil and gas exploration, protecting the groundwater has always been an issue, and thousands of times, if not millions, someone has...