Environmental Management

Many of our major production facilities, including Gary Works, Mon Valley Works, Great Lakes Works, Granite City Works, USSK and U. S. Steel’s Big River Steel Works, have Environmental Management Systems that are certified to ISO 14001—the International Organization for Standardization’s framework for measuring and enhancing environmental performance. We work to reduce emissions at our operations and to implement innovative best-practice solutions that improve our environmental performance and lower energy consumption. See our website for a full list of our certifications.


62% of U. S. Steel’s’s facilities are ISO 14001 certified

North America’s First ResponsibleSteel™ Site Certification

In April 2022, U. S. Steel’s Big River Steel 1 (BR1) mill in Osceola, Arkansas was awarded ResponsibleSteel™ certification making our site the first in North America to meet the standard. In 2023 the facility underwent and passed a rigorous ResponsibleSteel™ surveillance audit to ensure it is acting in accordance with the terms of its certification, affirming BR1’s commitment to sustainability.

ResponsibleSteel™ is the steel industry’s only global multi-stakeholder industry standard and certification for environmental, social and governance criteria. The ResponsibleSteel™ standard aligns with our core S.T.E.E.L. Principles and reinforce best practices essential to our Best for All® strategy.

Additionally, we were recognized by BNSF Railway with an award for receiving site certification and leading the way for sustainable steel manufacturing.

Meeting the substantial requirements of the SRI Quality System Registrar (SRI) independent third-party audit for our ResponsibleSteel™ site certification was a true team effort. SRI conducted extensive stakeholder interviews throughout the Osceola, Arkansas community, and many stakeholders also sent letters of support. The site certification supports our workers and community because it includes rigorous social criteria a company must satisfy to be certified in addition to its environmental and governance criteria. For these reasons, we believe ResponsibleSteel™ offers the most comprehensive, inclusive, and trustworthy certification for sustainable steel today.

Looking ahead, we plan to seek ResponsibleSteel™ certification of our products. The certification will pave the way for our sustainable steel to be marketed as an externally verified product.