Environmental stewardship is a core value at U. S. Steel, stemming from the Gary Principles created in the early 1900s and continuing today in our S.T.E.E.L. Principles.

We know we must operate our facilities in an environmentally responsible manner and take steps to protect and preserve our shared natural resources. As a company, U. S. Steel articulates our core value of environmental stewardship through three basic principles that are the responsibility of all our employees and our operations.

Those principles are:

  • Compliance with environmental laws and regulations;
  • Continuous improvement in environmental and resource management; and
  • Continued reduction of emissions through innovation.
With a focus on these principles, U. S. Steel collaborates with organizations and peers to promote sustainable and cost-effective environmental strategies through the development of appropriate air, water, waste and climate-change laws and regulations at the local, state, national, and international levels. We are committed to reducing our emissions in our operations and are implementing innovative best practice solutions to improve our environmental performance and reduce energy consumption.


  • Many of our major production facilities, including Gary Works, Mon Valley Works, Great Lakes Works, Granite City Works, USSK and Big River Steel have Environmental Management Systems that are certified to ISO 14001 — the framework for the measurement and improvement of environmental impacts.
  • We have a comprehensive Environmental Management Policy covering all material aspects of our approach to environmental topics.


Key data points about environmental stewardship at U. S. Steel.


Percentage of total capital expenditures dedicated to Environmental capital projects in 2021


Amount spent on improvement projects, equipment, facilities, expert personnel, monitoring and more associated with environmental compliance in 2021


Percentage of total costs and expenses tied to environmental compliance in 2021

Environmental Areas of Focus

U. S. Steel’s current environmental areas of focus align with the results of our ESG Materiality Assessment.