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Our Story

The challenges have changed. So have we.

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Innovation

Seeing the full system and improving it.

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Driving long-term value through responsible delivery.

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Explore our locations across the U.S., Canada and Australia.

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Emergency Response

Building readiness for decisive environmental action.

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Stack Testing

Accurate, EPA-compliant stack testing for industrial facilities.

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Leak Detection

Managing fugitive emissions in complex industrial facilities.

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Our Thinking Spotlight

The Onterris Outlook Report
NEW REPORT

The Onterris Outlook: Why Environmental Performance Is Business-Critical

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BRIEF

Federal Methane Rules in 2026: What Oil and Gas Operators Need to Do Now

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PERSPECTIVE

CCL 6 Is a Signal, Not a Standard. Why a Science-Forward Strategy Matters Now

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BRIEF

The HON MACT Rule: Shifting Compliance Monitoring to Emissions Intelligence

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Who We Are
Onterris is a global environmental solutions company partnering with organizations to solve complex challenges where environmental pressures, regulatory expectations and operational risks intersect.
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Prepare for escalating environmental risks with expert solutions designed to perform under pressure.
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Our Thinking
Explore briefs, perspectives and articles that turn insight into action. Discover thought leadership that informs decisions and drives impact. See the ideas shaping environmental solutions and guiding your next move.
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Cuture & Careers
Where brilliant people come together to turn environmental science into real-world progress for communities, industry and the planet.
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Mining

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Brief
3 min read

EPA’s Coal Ash Proposal Creates a New Decision Point for Utilities

The U.S. Environmental Protection Agency (EPA)’s proposed rule could give power generators more room to make site-specific closure decisions. The opportunity is real, but only for utilities that can support their position with clear data, sound judgment and a defensible record.
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Case study
5 min read

Pioneering Sustainable Energy Transition, Protecting Wildlife: Saint Elmo Vanadium Mining Project

Sustainable mining advanced through integrated approvals, community stewardship and innovative Julia Creek Dunnart research
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Case study
3 min read

Advancing Brownfield Approvals to Restart Responsible Gold Production

Early regulator alignment and a coordinated approvals strategy cleared a practical pathway to restart operations and modernize closure planning on a legacy site
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Article
8 min read

Critical Minerals, Strategic Alliances and the Race to Build Responsible Supply Chains

U.S., Canadian and Australian collaboration will determine how fast essential materials reach global markets
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OUR THINKING

Explore all briefs, perspectives and articles that turn insight into action.

Discover thought leadership that informs decisions and drives impact.
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