ONE Gas 2026 Sustainability Report Highlights Progress on Safety, Environmental Stewardship and Community Commitment

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ONE Gas (NYSE: OGS) released its 2026 Sustainability Report, covering progress from Jan. 1 to Dec. 31, 2025, on safety, environmental stewardship and community support across Kansas, Oklahoma and Texas.

The company received an American Gas Association Safety Achievement Award for the ninth consecutive year and replaced more than 400 miles of mains, service and transmission lines to enhance safety and reduce fugitive emissions. ONE Gas reported an estimated 53% reduction in Scope 1 emissions from distribution pipeline leaks versus a 2005 baseline, nearing its 2035 goal of 55%. In 2025, it issued 26,477 energy-efficiency rebates totaling about $14.1 million, helping customers avoid an estimated 40,840 metric tons of CO2e.

Employee engagement participation reached 91%, with the company in the top quartile of Gallup’s Overall Company Database. ONE Gas employees, retirees, family and friends contributed over 10,575 volunteer hours, while ONE Gas Foundation grants and community investments totaled $3.2 million.

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TULSA, Okla., July 22, 2026 /PRNewswire/ -- ONE Gas has released its 2026 Sustainability Report, highlighting the company's commitment to delivering affordable, reliable and safe natural gas while investing in system integrity, reducing emissions and supporting employees, customers and communities across Kansas, Oklahoma and Texas. The annual report highlights progress, projects and milestones from January 1, 2025, through December 31, 2025, unless noted otherwise.

"At ONE Gas, we're proud to deliver affordable, reliable natural gas to the customers we serve," said Robert S. McAnnally, chief executive officer of ONE Gas. "This report highlights how we meet today's energy needs while continuing to invest in the future, with a focus on safety, environmental stewardship, our employees and the communities we call home."

Sustainability Report Highlights

• Safety and System Integrity
  Safety remains ONE Gas' top Core Value. In 2025, the American Gas Association recognized ONE Gas with a Safety Achievement Award for the ninth consecutive year, reflecting the company's strong safety performance among similarly sized natural gas distribution companies. ONE Gas also replaced more than 400 miles of distribution mains, service lines and transmission lines to improve safety and reduce fugitive emissions.
• Environmental Stewardship
  ONE Gas continued to make progress toward its 2035 goal to reduce Scope 1 emissions due to leaks from its distribution pipeline system by 55%, measured from an estimated 2005 baseline and accounting for projected system growth. As of Dec. 31, 2025, the company achieved an estimated 53% reduction. In 2025, ONE Gas also issued 26,477 energy efficiency rebates totaling approximately $14.1 million, helping customers reduce energy use and avoid an estimated 40,840 metric tons of CO2e emissions.
• Social Commitment
  ONE Gas' commitment to service extends to employees, customers and communities. Employee engagement increased for the ninth consecutive year, with 91% of employees participating in the 2025 Gallup engagement survey and the company again ranking in the top quartile of Gallup's Overall Company Database. ONE Gas employees, retirees, family and friends also contributed more than 10,575 volunteer hours, while ONE Gas Foundation grants and community investments totaled $3.2 million across Kansas, Oklahoma and Texas.

For a comprehensive look at ONE Gas' 2026 Sustainability Report, visit www.onegas.com

About ONE Gas 
ONE Gas, Inc. (NYSE: OGS) is a 100% regulated natural gas utility, and trades on the New York Stock Exchange under the symbol "OGS." ONE Gas is included in the S&P MidCap 400 Index and is one of the largest natural gas utilities in the United States.

Headquartered in Tulsa, Oklahoma, ONE Gas provides a reliable and affordable energy choice to more than 2.3 million customers in Kansas, Oklahoma and Texas. Its divisions include Kansas Gas Service, the largest natural gas distributor in Kansas; Oklahoma Natural Gas, the largest in Oklahoma; and Texas Gas Service, the third largest in Texas, in terms of customers. 

For more information and the latest news about ONE Gas, visit onegas.com and follow its social channels: X, Facebook, LinkedIn and YouTube.

Media Contact:
Leah Harper
Phone: 918-947-7123
Leah.Harper@onegas.com

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SOURCE ONE Gas, Inc.

FAQ

What are the key highlights of ONE Gas (OGS) 2026 Sustainability Report?

ONE Gas reports strong safety recognition, major pipeline replacements, significant emissions reductions and community investments. According to ONE Gas, 2025 actions included more than 400 miles of pipe replaced, 53% lower Scope 1 emissions from leaks, and $3.2 million in community grants and investments.

How much has ONE Gas (OGS) reduced emissions by 2025 toward its 2035 goal?

ONE Gas estimates a 53% reduction in Scope 1 emissions from pipeline leaks by Dec. 31, 2025. According to ONE Gas, this progress is measured versus an estimated 2005 baseline and moves the company close to its 55% reduction goal targeted for 2035.

What safety achievements did ONE Gas (OGS) report in its 2026 Sustainability Report?

ONE Gas received an American Gas Association Safety Achievement Award for the ninth consecutive year. According to ONE Gas, the company also replaced more than 400 miles of distribution mains, service lines and transmission lines in 2025 to enhance system safety and reduce fugitive emissions.

How is ONE Gas (OGS) supporting customer energy efficiency in 2025?

ONE Gas issued 26,477 energy efficiency rebates totaling about $14.1 million during 2025. According to ONE Gas, these rebates helped customers reduce energy use and avoid an estimated 40,840 metric tons of CO2-equivalent emissions across its Kansas, Oklahoma and Texas service territories.

What community and social impact did ONE Gas (OGS) report for 2025?

ONE Gas reported 10,575+ volunteer hours from employees, retirees, family and friends in 2025. According to ONE Gas, the ONE Gas Foundation and company community investments also totaled $3.2 million across Kansas, Oklahoma and Texas, reflecting its broader social commitment to local communities.

What were ONE Gas (OGS) employee engagement results in the 2026 Sustainability Report?

Employee engagement participation reached 91% in the 2025 Gallup survey at ONE Gas. According to ONE Gas, engagement increased for the ninth straight year, and the company again ranked in the top quartile of Gallup’s Overall Company Database, indicating relatively strong workforce engagement.