The Partnership's Business Coalition for Clean Air has pledged at least a 75 percent reduction by its member companies.
Nitrogen oxide is the key smog-forming pollutant targeted in the smog plan.
Collectively, the area's dozens of petrochemical, utility and other industrial plants are the region's largest source of nitrogen oxide. Besides the refinery, BP operates chemical plants in Texas City and Pasadena and near Alvin. Meeting the 90 percent mandate will not be cheap or easy, Scruggs said. In those instances, the company will be working with state officials to find new technologies, she said. Along with its 90 percent mandate for petrochemical, utility and other plants, the smog plan's proposals include a 55 mph speed limit, stricter tailpipe tests and restrictions on the use of lawn and construction equipment.