After BP’s Texas City, Tex., refinery blew up in 2005, killing 15 workers, the company vowed to address the safety shortfalls that caused the blast.

The next year, when a badly maintained oil pipeline ruptured and spilled 200,000 gallons of crude oil over Alaska’s North Slope, the oil giant once again promised to clean up its act.

In 2007, when Tony Hayward took over as chief executive, BP settled a series of criminal charges, including some related to Texas City, and agreed to pay $370 million in fines. “Our operations failed to meet our own standards and the requirements of the law,” the company said then, pledging to improve its “risk management.”

Despite those repeated promises to reform, BP continues to lag other oil companies when it comes to safety, according to federal officials and industry analysts. Many problems still afflict its operations in Texas and Alaska, they say. Regulators are investigating a whistle-blower’s allegations of safety violations at the Atlantis, one of BP’s newest offshore drilling platforms in the Gulf of Mexico.