Report: Flaws in EPA drilling pollution data

WASHINGTON (AP) — Limited data and unreliable estimates on air pollution from oil and natural gas production is hindering the Environmental Protection Agency’s efforts to police the drilling boom, the agency’s internal watchdog said in a report released Thursday.

Inspector General Arthur Elkins Jr. said the EPA has failed to directly measure emissions from some pieces of equipment and processes, and some estimates it does have are of “questionable quality.”