The facility is primarily located in Whiting, Indiana, USA, though portions of the 1,400 acres (5.7 km2) complex span into the neighboring cities of Hammond and East Chicago.

[2] In 2012 BP undertook a $14B modernization project at Whiting to remove older, less efficient equipment and to install state-of-the-art pollution controls to emissions[1][2] which will "reduce harmful air pollution that can cause respiratory problems such as asthma and are significant contributors to acid rain, smog and haze, by more than 4,000 tons per year.

"[1][2] However, BP North America did not fulfill all its obligations under the 2001 settlement agreement and committed new violations of the Clean Air Act at the Whiting refinery during the construction project, such as flaring devices.

As a result, the Environmental Protection Agency (EPA) and the Department of Justice fined BP North America $8M and required the company to install innovative pollution controls similar to those in a 2012 EPA settlement with Ohio-based Marathon Petroleum Corporation in April 2012 which involved reducing flares and increasing combustion efficiencies.

[2][9] In 2021 BP settled a citizen suit brought by environmental groups by agreeing to stricter monitoring of soot particulate pollution and a $500,000 settlement.