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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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Our commitments

Driving long-term value through responsible delivery.

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Locations

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

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Featured Solutions

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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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Contact Laboratory Services

Request a quote for advanced laboratory analysis and support.

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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

Culture & Careers
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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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Access deep environmental expertise tailored to your industry, with solutions built for real-world conditions.
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Solutions
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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Industrial

Industrial compliance is tightening, and communities expect faster, defensible emissions answers. Explore the content below for insight on LDAR modernization, continuous monitoring, fenceline monitoring and digital reporting that turn requirements into action alongside reliability.
Field technician servicing solar-powered environmental monitoring equipment outdoors.
Perspective
3 min read

Turning Methane Data into Better Operational and Business Decisions

Using defensible methane data to prioritize action, improve performance and demonstrate value
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Aerial view liquid chemical tank terminal.
Brief
3 min read

California SB 1137: Why Early Planning is Crucial for Oil and Gas Operators

Learn how California oil and gas operators can prepare for SB 1137 with early sampling, air dispersion modeling, EDS planning and a defensible LDRP.
Read More
Male worker checking basil seed bottle product on the conveyor belt in the beverage factory.
Perspective
3 min read

Your Bottling Plant Measures Almost Everything. Why Not CO2 Loss?

Tracking carbon dioxide (CO₂) loss helps plants reduce emissions, prioritize repairs and protect margins
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Male employee testing soil after oil spill in mountains.
Brief
3 min read

Ontario O. Reg. 406/19: 2027 Excess Soil Rules

Ontario’s excess soil landfill restriction takes effect Jan. 1, 2027. Learn how O. Reg. 406/19 affects reuse planning, QP support and project schedules.
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Article
4 min read

Marcellus Gas: Environmental Data & Market Access

Explore how Marcellus gas operators can connect methane monitoring, environmental data and operations to build buyer confidence and support market access.
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Brief
6 min read

Future-Proofing Semiconductor Fabrication: Managing PFAS Risk Without Sacrificing Uptime

The right treatment strategy can help semiconductor manufacturers control PFAS risk without disrupting production
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Part of a chemical plant or refinery with fractioning or distillation towers, boilers and pipes for oil and chemicals against a blue sky.
Case study
3 min read

A Smarter Air Permitting Strategy for a Texas Refinery

Strategic planning creates a more efficient permitting pathway and keeps critical refinery modernization on schedule
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A close-up view of fluffy white foam or bubbles spread across a surface.
Brief
3 min read

AFFF Transition Is Not Just a Foam Swap

Removing legacy foam without addressing residual contamination, system compatibility and waste management creates serious operational and environmental risks long after the changeout is complete
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Article
8 min read

The Industrial Wastewater Paradigm Shift: From Treatment to Resource Recovery

Why forward-thinking industries are transforming wastewater from a compliance cost into a strategic source of water, energy and valuable materials
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Aerial view of a landfill in a mountainous area.
Article
6 min read

Odor Complaints Need Chemistry

Odor complaints often begin with someone reporting a smell in the environment: rotten eggs, chemical-like or something foul
Read More
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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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