Who We Are
Delivering for Planet & Progress
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 understand environmental systems, not just symptoms. By bringing together capabilities across disciplines and geographies, we help organizations address interconnected challenges with solutions grounded in environmental science and informed by real-world operational experience.
Across industries and regions, we work alongside clients to strengthen resilience, mitigate risk and enable responsible progress. We take seriously our responsibility to help protect the air we breathe, the water we drink and the soil that sustains communities and economies. Through science-driven insight, practical implementation and collaborative partnership, we uncover responsible paths forward for planet and progress.
Our scientists, engineers, field teams and consultants apply systems thinking that unites science, data and practical expertise to understand environmental systems, not just symptoms. By bringing together capabilities across disciplines and geographies, we help organizations address interconnected challenges with solutions grounded in environmental science and informed by real-world operational experience.
Across industries and regions, we work alongside clients to strengthen resilience, mitigate risk and enable responsible progress. We take seriously our responsibility to help protect the air we breathe, the water we drink and the soil that sustains communities and economies. Through science-driven insight, practical implementation and collaborative partnership, we uncover responsible paths forward for planet and progress.
WHY IT MATTERS
Environmental challenges do not exist in isolation
They are interconnected, crossing systems, sectors and borders, shaping outcomes for our clients, their customers and the communities they serve.
As global experts in environmental science, we see the bigger picture and connect the dots others might miss. From air and water to land and infrastructure, each element influences the next. What happens in one place can ripple across regions, industries and generations.
This complexity demands a systems-based approach. By working at the intersection of science, data and real-world conditions, we uncover insights that move beyond symptoms to address root causes.
Navigating these connections allows us to identify responsible paths forward, helping organizations make decisions that are informed, resilient and aligned with both environmental integrity and human progress.
As global experts in environmental science, we see the bigger picture and connect the dots others might miss. From air and water to land and infrastructure, each element influences the next. What happens in one place can ripple across regions, industries and generations.
This complexity demands a systems-based approach. By working at the intersection of science, data and real-world conditions, we uncover insights that move beyond symptoms to address root causes.
Navigating these connections allows us to identify responsible paths forward, helping organizations make decisions that are informed, resilient and aligned with both environmental integrity and human progress.
Why Onterris
Turning complex challenges into clear progress
We are always true to the science
Working with passion and dedicated to the data, our recommendations and actions are shaped by our expertise in environmental science.
We are instinctive integrators
We are experts at orchestrating the right expertise across Onterris and our partners to meet any client challenge.
We see environmental systems, not symptoms
Our scale and diverse offering enable us to see the big picture. Connected challenges, not isolated problems. Recognizing that no problem exists in isolation.
We take responsibility
Helping protect the air we breathe, the water we drink, and the soil that sustains us is a responsibility we take seriously, as we act as stewards to reduce the environmental impact of progress.
sustainability report
Turning commitments into action for planet and progress
We’re taking measurable steps to reduce our impact, operate more efficiently and build a more sustainable, resilient Onterris.
Our People
Uniting for Planet & Progress
We are here to advance the way people live, work and grow without compromising the world we share. People make Onterris possible, so culture is how we lead. Our employee value proposition is Uniting for Planet & Progress, a mindset that brings purpose-driven people together to create lasting impact.
Everything we do is powered by people with purpose. Scientists, consultants, engineers, professionals and innovators working side by side, learning from each other and holding a high bar for how we show up. We bring environmental integrity and human ambition into the same conversation, then do the work to move both forward.
Everything we do is powered by people with purpose. Scientists, consultants, engineers, professionals and innovators working side by side, learning from each other and holding a high bar for how we show up. We bring environmental integrity and human ambition into the same conversation, then do the work to move both forward.
Our Thinking
Rethinking Emissions Monitoring as a Tool for Operational Assurance
Temp CEMS and FTIR: A practical example of how chemical manufacturers can turn emissions data into faster, more informed decisions.
Landfill Gas Is the Ultimate Test of Environmental Maturity
Elevated landfill methane emissions can signal more than a gas problem. Learn how operators can connect methane data with liquids, cover and site operations.
California El Niño: Regulatory Guidance for Emergency Stream and Channel Work
Prepare for California El Niño impacts with guidance on emergency stream and channel work, regulatory coordination, documentation and response planning.
Canada’s Federal VOC Regulations: What Facility Operators Need to Prioritize
Federal VOC Regulations Phase 2 focus on emissions from petroleum liquid storage tanks and loading racks, with phased requirements now in effect for affected facilities.
Rebuilding Highway 8 for a Changing River
See how Onterris helped rebuild Highway 8 along the Nicola River with climate-resilient bridge design, hydrotechnical engineering and habitat enhancements.
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.
Your Bottling Plant Measures Almost Everything. Why Not CO2 Loss?
Tracking carbon dioxide (CO₂) loss helps plants reduce emissions, prioritize repairs and protect margins
CERCLA Liability Exemptions for Brownfield Buyers
Learn which CERCLA liability exemptions and defenses may apply to brownfield owners, and why due diligence, AAI and documentation still matter.
When Landfills Run Hot: Why Leachate Strategy Matters
Learn how elevated temperature landfills can change leachate chemistry, treatment needs and costs and why early characterization and contingency planning matter.
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.
Building Environmental Certainty Before Shovels Hit the Ground
Early environmental insight helps project teams manage compliance risk, use resources more efficiently and build greater cost and schedule certainty into project delivery
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.
Why Water is the Critical Path for Critical Minerals
How early water planning can help critical minerals projects advance responsibly, build resilience and earn lasting support
California AB 28 Becomes Law: What Landfill Operators Need to Prepare for
New notification, investigation and corrective action requirements create a statewide framework for identifying and managing subsurface elevated temperature events at certain California landfills.
How Ambient Air Monitoring Provides Context and Transparency for Data Centers
Ambient air monitoring helps data center developers establish pre-construction air quality baselines, track changing conditions and contribute to greater environmental transparency throughout the project lifecycle