Onterris, (NYSE: MEG, changing to ONT May 4, 2026), previously Montrose Environmental Group, today announced that its “Closing the Loop on Contamination: A Smarter, Cleaner Path to PFAS-Free Water” project has been named a Judges’ Choice winner in the 2026 Environment+Energy Leader Awards. The annual program recognizes companies delivering measurable progress in energy management, environmental performance, and sustainability. In addition to this top honor, Onterris was also recognized across multiple categories, including Digital Transformation, Energy Innovation and Environmental Impact, underscoring the breadth of its leadership in advancing sustainable, high-performance environmental solutions.

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“This award reflects the Onterris commitment to practical, science-driven innovation that helps organizations solve complex environmental challenges,” said Vijay Manthripragada, President and CEO of Onterris. “By uniting deep technical expertise with real-world execution, we help our clients navigate complexity, build resilience and advance solutions that support both environmental integrity and real-world impact for planet and progress.”

Award-Winning Innovation

“Closing the Loop on Contamination: A Smarter, Cleaner Path to PFAS-Free Water” was recognized in the Business & Infrastructure category for its impact in dramatically reducing PFAS waste and emissions while improving operational efficiency and lifecycle cost performance through a closed-loop, regenerable treatment model. This recognition reflects Onterris’ commitment to delivering measurable results and helping organizations navigate increasingly complex environmental and energy challenges.

Onterris’ award-winning initiative centers around its SORBIX™ RePURE technology, the world’s first regenerable ion exchange system purpose-built to remove PFAS from water systems. Designed to overcome the limitations of single-use treatment models, RePURE enables a closed-loop process that removes PFAS while allowing treatment media to be reused indefinitely. The technology is supported by a patented hub-and-spoke model that centralizes resin regeneration, enabling multiple municipalities and industrial users to share infrastructure – dramatically reducing cost, waste and complexity. With both fixed and mobile deployment options, Onterris delivers rapid response for urgent contamination and a clear path to long-term remediation.

The impact is both measurable and transformative. RePURE reduces PFAS-laden waste by more than 99%, eliminating the need for recurring disposal through landfilling or high-temperature incineration. Its shared infrastructure model cuts operational costs and environmental footprint by more than 50%, while systems deployed globally now treat billions of gallons of water each year. By combining scientific innovation with scalable infrastructure, Onterris is helping communities and industries meet evolving regulations while safeguarding the air, water and soil that sustain life.

“As organizations navigate an increasingly dynamic and uncertain operating environment, the ability to improve efficiency, reduce emissions, and deliver measurable results has never been more critical,” said Sarah Roberts, Co-President and Publisher of Environment+Energy Leader. “This year’s winners demonstrate the innovation and leadership required to move forward with clarity and impact.”

About Onterris

Onterris is a global environmental solutions company partnering with organizations to solve complex challenges where environmental pressures, regulatory expectations and operational risks intersect. Guided by our mission to advance the way of life without compromising the integrity of our environment, we believe environmental responsibility and human progress are fundamentally connected. Our scientists, engineers, field teams and consultants apply systems thinking that unites science, data and practical expertise to deliver solutions that strengthen our clients’ resilience, mitigate risk and protect the air, water and soil that sustain communities, while uncovering responsible paths forward for planet and progress. For more information, visit www.onterris.com.

About the Environment+Energy Leader Awards

Now in its 14th year, the Environment+Energy Leader Awards program recognizes excellence across products, projects, startups and organizational initiatives that deliver meaningful advancements in environmental programs, sustainability, and energy management. Entries are evaluated by an independent panel of industry experts, with a focus on innovation, scalability, and measurable impact. Winners are recognized as leaders in advancing best practices and setting new standards across the global energy and environmental landscape.

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“By uniting deep technical expertise with real-world execution, we help our clients navigate complexity, build resilience & advance solutions that support both environmental integrity & real-world impact.” - Vijay Manthripragada, President & CEO, Onterris