Pennsylvania alone, regulators estimate that 184,000 wells were drilled before records were kept. Many of those wells were plugged with stumps, rocks or nothing at all.
Even Texas, which has invested heavily in abandoned wells, is years away from plugging all of its open holes. Since 1984, it has plugged more than 30,000 wells. But almost 10,000 are still open, and more are found and added to the list all the time.
In the last 150 years, prospectors and energy companies have drilled as many as 12 million holes across the United States in search of oil and gas.
Read the link to see how your drinking water may soon be polluted.