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.

Solid Waste

Managing complex environmental compliance, monitoring and permitting requirements for landfill operators, waste infrastructure owners and municipalities.
An overview shot of a landfill site
Laboratory sample vials containing environmental testing materials.
INTRO

Helping facilities plan, permit and perform with confidence

Solid waste facilities are critical public infrastructure, but operators must manage landfill permitting, leachate treatment, methane emissions and environmental monitoring within increasingly demanding regulatory frameworks.

Our solid waste environmental consulting teams combine environmental science, regulatory expertise and advanced monitoring technologies to support landfill operators, waste management companies and public agencies. By integrating permitting strategy, monitoring programs and treatment solutions, we help facilities maintain compliance, protect communities and sustain reliable operations.
Why it matters

Waste infrastructure carries responsibility for generations

Landfills and waste management facilities operate within environmental systems that must perform long after waste is deposited. Methane emissions, leachate management, groundwater protection and site stability require continuous monitoring and responsible long-term stewardship.

At the same time, regulatory expectations and community awareness continue to increase. Operators must demonstrate reliable environmental monitoring, transparent reporting and disciplined compliance to maintain permits and public confidence.

Organizations that understand environmental conditions early can anticipate risks, strengthen waste management compliance and guide landfill operations with greater certainty across the full lifecycle of waste infrastructure.
Environmental technician inspecting industrial equipment at a processing facility.
Blue sky with scattered white clouds.

Environmental control starts below the surface

Evaluating, designing and optimizing leachate collection and treatment systems, our team protects soil and groundwater while supporting efficient landfill operations.
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Responsible waste infrastructure expertise

Explore our integrated environmental capabilities supporting landfill permitting, monitoring, leachate treatment and long-term waste facility management.
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Permitting & Compliance

Working through air, water and land permitting requirements and building compliance programs that hold up under regulatory review, across regulated industries.
Professional reviewing environmental or safety data on a computer.

Health, Safety & Chemistry

Bringing scientific precision to critical decisions
Woman wearing a yellow vest and looking through binoculars while standing in a field with homes and mountains in the background.

Methane

Detect, quantify and manage methane emissions with advanced measurement technologies, defensible data and regulatory expertise.
Laboratory technician handling samples during environmental testing.

Emerging Contaminants

Identify, assess and manage PFAS and other emerging contaminants with advanced science, regulatory insight and integrated environmental solutions.
SECTOR LEADER

Meet your Solid Waste sector leader

Connect with our solid waste experts to strengthen environmental performance, navigate permitting and sustain responsible landfill operations.

Solid Waste Spotlight

New Guide

The Environmental Strategy Maturity Curve

A practical roadmap to move from reactive compliance to proactive environmental leadership
New Report

The Onterris Outlook

Why environmental performance is business-critical

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.

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

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.

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

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

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

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?”

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