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.

Environmental stewardship is a core value at U. S. Steel, firmly embedded as one of 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.

These principles are:

  • Compliance with environmental laws and regulations
  • Continuous improvement in environmental and resource managementand
  • Continued reduction of GHG emissions through innovation
With a focus on these principles, U. S. Steel collaborates with industrial organizations and in collaboration with our peer companies 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.


Many of our major production facilities, including Gary Works, Mon Valley Works, Great Lakes Works, Granite City Works, USSK and BRS, have Environmental Management Systems that are certified to ISO 14001 — the International Organization for Standardization’s framework for measuring and enhancing environmental performance.

We are committed to reducing emissions at our operations and to implementing innovative best practice solutions that improve our environmental performance and lower energy consumption.  


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


Percentage of total capital expenditures dedicated to Environmental capital projects in 2022


Amount spent on improvement projects, equipment, facilities, expert personnel, monitoring and more associated with environmental compliance in 2022


Percentage of total costs and expenses tied to environmental compliance in 2022

Environmental Areas of Focus

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