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.
Sectors
Access deep environmental expertise tailored to your industry, with solutions built for real-world conditions.
Solutions
Prepare for escalating environmental risks with expert solutions designed to perform under pressure.
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.
Cuture & Careers
Where brilliant people come together to turn environmental science into real-world progress for communities, industry and the planet.

Health, Safety & Chemistry

Bringing scientific precision to critical decisions
Professional reviewing environmental or safety data on a computer.
Macro view of air bubbles suspended in water with blue tones and abstract composition
INTRO

Environmental advisory for high-stakes decisions

Organizations operating in regulated sectors face complex environmental, health and safety (EHS) risks that influence compliance, operational stability and long-term business value. Navigating these pressures requires more than routine support. It demands environmental advisory services grounded in scientific rigor and regulatory insight.

Our specialists integrate chemistry, toxicology, industrial hygiene and regulatory expertise to help organizations understand environmental risk, strengthen compliance systems and make confident decisions. Through regulatory advisory services, federal compliance support and environmental risk management, we help clients address emerging contaminants, complex exposure scenarios and evolving regulatory frameworks.

By combining advanced analytics, sustainability guidance and climate disclosure consulting with tailored environmental compliance strategies, we help organizations reduce uncertainty, protect people and assets, and move forward with clarity in complex operating environments.
Why it matters

Environmental risk reaches the executive agenda

EHS risks increasingly influence operational continuity, regulatory exposure and stakeholder confidence. When environmental data, chemical complexity or regulatory interpretation are misunderstood, the consequences can escalate quickly across operations, threatening reputations, stakeholder trust and asset value.

Regulatory expectations are also evolving rapidly. Organizations must interpret new requirements, address emerging contaminants and maintain environmental compliance while supporting business growth and operational performance.

Effective environmental risk management requires defensible data, rigorous analysis and clear regulatory interpretation. With the right environmental advisory support, organizations can identify risks earlier, strengthen compliance strategies and support climate disclosure consulting and sustainability reporting guidance.

By understanding environmental conditions and regulatory expectations early, leaders can make informed decisions that protect people, assets and long-term business performance.
Aerial view of a mining site with water ponds and stockpiled material.
Automated laboratory equipment processing environmental testing samples.
Laboratory professional wearing safety glasses while working with analytical equipment.

Environmental science delivering real-world results

Identified contaminant sources across complex groundwater systems

Stabilized compliance across multi-site industrial operations

Resolved emerging contaminant risks through advanced chemistry

Strengthened federal environmental compliance across regulated portfolios

Delivered defensible data for regulatory and legal scrutiny

Enabled credible climate disclosure and sustainability reporting

Health, Safety & Chemistry Solutions

Laboratory scientist examining a liquid sample in a beaker during chemical analysis.

Chemistry Consulting 

Onterris provides chemistry consulting that helps teams trust the data they use to make critical environmental and business decisions.
Technician performing workplace exposure monitoring

Health & Safety

Onterris helps organizations protect workers, improve safety execution, and strengthen operational resilience through integrated health and safety services.
Employee wearing white gloves and pouring water sample into container with body of water in the background.

Industrial Hygiene

Industrial hygiene plays a critical role in helping organizations understand risk, strengthen compliance and protect people in demanding operating environments.
Environmental professional collecting field monitoring data

EHS&S Management Information Solutions (EMIS)

Environmental, Health, Safety & Sustainability (EHS&S) programs depend on systems that turn requirements, data and workflows into consistent action.

Scientific depth. Practical direction.

Integrated science, regulatory expertise and advisory insight help organizations understand environmental risk, strengthen compliance and deliver lasting impact.
Microscopic view of biological or environmental sample material under laboratory analysis.

Explore Related Content

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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 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.

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.

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.

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

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

The right treatment strategy can help semiconductor manufacturers control PFAS risk without disrupting production

A Smarter Air Permitting Strategy for a Texas Refinery

Strategic planning creates a more efficient permitting pathway and keeps critical refinery modernization on schedule

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

Odor Complaints Need Chemistry

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

“Just-in-Time” Compliance: The Hidden Risk Building in Legacy Environmental Programs

Teams in asset-intensive industries now need to recognize indicators of operational risk long before compliance brings them into view

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?”