The lawsuit isn’t about whether the permit is good. It’s about whether EPA will say anything at all.
Four groups filed suit: the Environmental Law & Policy Center, the Environmental Integrity Project, Gary Advocates for Responsible Development, and Just Transition Northwest Indiana. They filed in the U.S. District Court for the District of Columbia. They want a court order forcing EPA to either grant or deny a petition they filed on July 3, 2025.
A 60-day deadline, missed by 10 months
Under the Clean Air Act, EPA gets 60 days to respond when someone petitions it to object to a state-issued Title V operating permit. The Indiana Department of Environmental Management issued the renewed permit for Gary Works on May 7, 2025. The groups petitioned two months later. EPA has been silent since.
“EPA’s failure to act prevents resolution of serious questions we and others have about whether the Gary Works permit contains the monitoring and compliance measures necessary to protect public health,” said Max Lopez, associate attorney at ELPC.
What the petition actually alleges
Not that emissions are illegal. That nobody can tell whether they are.
The petition says the permit lacks adequate monitoring to verify compliance with particulate matter limits, Lake County opacity limits and coal pulverization limits. It says blast furnace limits have no compliance monitoring, recordkeeping or reporting attached. And it says the permit is missing corrective action and maintenance plans.
The complaint ties Gary Works emissions, including nitrogen oxides, VOCs and hazardous air pollutants, to ground-level ozone and elevated risks of asthma, lung cancer, heart attacks and strokes.
Why steelmakers and their builders are watching
Gary Works is US Steel’s largest plant, with capacity up to 7.5 million net tons a year and more than 4,000 employees. US Steel, now owned by Nippon Steel, declined to comment, noting it isn’t an active party to the suit. EPA declined, citing pending litigation.
The construction angle is the capital plan. Nippon has committed to a $475 million quench-and-tempering line at Fairfield, Alabama, up to $2.5 billion across Mon Valley Works, and a tin operations restart at Gary next year. In late May, more than 120 people turned out at a Gary town hall to argue that too much of the $3.1 billion earmarked for the plant would go toward coal-based equipment rather than cleaner technology.
That’s the real fight. Permit-monitoring litigation is the lever, but the question underneath is whether a multibillion-dollar reinvestment rebuilds a 20th-century plant or a 21st-century one. Domestic steel prices flow straight into structural bid packages, so how Gary gets rebuilt is not an abstraction for the steel fabricators and erectors pricing that work. ELPC has published the complaint and background.