For Planet & Progress
As global experts in environmental science, we see the big picture, connect the dots and recognize that no problem sits in isolation. The environmental challenges we face are interwoven, interconnected and international. Transcending borders and communities. Impacting neighborhoods and nations. We are systems thinkers. Navigating data at the boundaries of science to reveal the responsible path forward for each project.
Our Thinking
Designing a Modern LDAR Program: Why Compliance Alone Is No Longer Enough
The best LDAR programs no longer ask, “Are we compliant?” They ask, “What are our emissions telling us about our operation?”
Before You Buy a Brownfield: Keep the Bona Fide Prospective Purchaser Defense Intact
Environmental liability protection begins with thorough pre-acquisition due diligence, but preserving that protection requires buyers to actively manage environmental obligations after closing
Why the AFFF Transition Is Becoming a Major Engineering and Liability Test
As fluorine-free foam becomes the industry standard, facility operators are finding that the real challenge is not choosing a replacement, but addressing what legacy systems reveal during the transition
NEW REPORT
The Onterris Outlook: Why Environmental Performance Is Business-Critical
Why environmental performance is business-critical
Brownfields After the BIL Funding Peak: What EPA’s Planning Signals Reveal About 2027
Opportunity remains with U.S. EPA Brownfields Funding, but fiscal year 2027 will reward communities that combine disciplined planning, evidence-based decision-making and strong execution
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.
Why Landfills Are Now Central to the PFAS Conversation
Landfills are passive receivers of PFAS, but managing it requires an active strategy
U.S. Courts Challenge Federal Permitting Delays for Renewable Energy Projects
Court ruling curbs procedural delays as power demand surges
Long-Term Housing Planning Is Key to Successful Disaster Recovery
Housing decisions shape recovery long before rebuilding begins
How Industry Is Using Technology to Treat PFAS for Cleaner Legacies
Advanced treatment technology and scaled approaches are enabling industrial operators to address PFAS, reducing risk while aligning with evolving regulatory expectations
NSPS Subpart OOOOb: Operational Decisions That Define Oil and Gas Compliance
Adjusted compressor vent rules have changed how operators manage compliance risk, capital planning and emissions oversight
Air Permitting for Data Centers: What Determines Your Timeline
How location, power generation and the regulatory landscape affect data center air permits
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
Preparedness Starts Before the Incident
Organizations that invest in readiness respond faster, safer and with greater confidence
How Do Solid Waste Operators Make Smart Technology Decisions When the Future Is So Uncertain?
Waiting is no longer a strategy for PFAS risk
The EU Methane Regulations That Reshaped Global Energy Markets
Energy producers that want access to European markets must strengthen methane measurement, verification and transparency across their supply chains
The HON MACT Rule: Shifting Compliance Monitoring to Emissions Intelligence
From passive sampling to real-time diagnostics, facilities must rethink how they collect, interpret and act on emissions data
Featured Projects
Flexible Modular Leachate Treatment for Greater Operational Control
Integrated engineering and full-service operations provides an adaptable treatment pathway for changing site conditions and evolving requirements
A Smarter Air Permitting Strategy for a Texas Refinery
Strategic planning creates a more efficient permitting pathway and keeps critical refinery modernization on schedule
Keeping Sydney Metro West Tunnelling On Track With Audit-Backed Environmental Delivery
A multi-site investigation, remediation and validation program aligned with NSW EPA accredited Site Auditor review cycles enables construction teams to progress safely and confirm site suitability
Validating PFAS Destruction for Cleantech Innovator Aquagga
Advanced analytical approach verifies PFAS destruction in complex samples
Accelerating Remote Groundwater PFAS Treatment with Modular Systems
Compact deployment, remote operation and a reliable treatment design supported consistent PFAS treatment across six groundwater sites
Real-Time Benzene Source Detection for Refinery Emissions
Mobile PTR-TOF-MS monitoring helped a refinery pinpoint benzene emission sources in days, accelerate corrective action and strengthen regulatory confidence.
Delivering A PFAS Treatment Solution For Sydney Water
Rapid PFAS treatment deployment enables Australia’s largest water utility to meet drinking water guidelines and build community trust
Restoring A Critical Southwest Rail Corridor Through Decision-Grade Air Monitoring
A coordinated response paired continuous field intelligence with practical execution to guide evacuation decisions, protect crews and support the staged reopening of a critical freight and highway corridor
Building a Scalable Environmental, Health and Safety Operating Model Across a Growing Data Center Portfolio
Environmental health and safety consulting and software delivery stayed tightly aligned, giving the client a clearer path from evaluation to execution
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
NEW GUIDE
The Environmental Strategy Maturity Curve
A practical roadmap to move from reactive compliance to proactive environmental leadership
Onterris at a glance
Onterris is a global environmental solutions company partnering with organizations to solve complex challenges where environmental pressures, regulatory expectations and operational risks intersect.
3,500 Employees
Working as one to protect the integrity of our environment while advancing our way of life.
100+ Offices
Delivering deep regional expertise across the U.S., Canada and Australia.
6,100+ Clients
Advancing the world’s most asset- and resource-intensive industries through environmental stewardship.
Culture & Careers
We are systems thinkers
Navigating data at the boundaries of science to reveal the responsible path forward for each project.
