The DEP said most violations at conventional wells were administrative, while most at unconventional wells had to do with environmental health and safety.
An industry group said drillers have adhered to safety standards.
“Through continuous operational performance improvements, technological innovations and a commitment to environmental stewardship, Pennsylvania’s natural gas producers lead from the front,” Marcellus Shale Coalition president David Callahan said in a statement.
Given its long history of oil and natural gas extraction, Pennsylvania is also home to thousands of abandoned wells.
In its report, the DEP said it has identified a little over 12,000 abandoned wells, fewer than one-third of which are plugged. Unplugged abandoned wells can leak oil and brine into the water and soil, and they can release methane — a greenhouse gas with more than 80 times the warming power of carbon dioxide over a 20-year period.
“Finding solutions to plug these wells will make the commonwealth a healthier place for our current and future residents,” DEP Secretary Patrick McDonnell said in a statement.
Plugging abandoned wells is expensive. The DEP said it doesn’t have nearly enough money to plug the 200,000 abandoned wells that the department estimates remain unaccounted for.
Federal funding could be on the horizon: the bipartisan infrastructure deal President Biden announced last week includes $21 billion for well-plugging and other cleanup projects. Regulators in Pennsylvania believe that federal support could provide a much-needed boost to the state’s efforts, CBS News reports.
Read More: DEP report: Pennsylvania extracted more natural gas than ever during pandemic