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.

Technology & Digital Infrastructure

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

California’s New CII Stormwater Permit Expands Compliance Beyond Traditional Industrial Sites in the LA Region

Introducing new compliance obligations for large commercial and institutional properties within designated Los Angeles watersheds, this new CII permit could reshape stormwater regulation across the state

7 Things Data Center Operators Need to Know About Engine and Cogeneration Emissions Compliance

Field lessons for improving data quality, control performance and permitting decisions

Validating PFAS Destruction for Cleantech Innovator Aquagga

Advanced analytical approach verifies PFAS destruction in complex samples

Temporary Emissions Monitoring Gives Data Centers a Defensible Path from Commissioning to Operation

Why project teams use Temp-CEMS to protect go-live schedules, ensure air compliance and bring power capacity online with confidence

Solving the PFAS Challenge Starts with a Different Question

The challenge is no longer finding PFAS, it’s proving treatment performance under real-world conditions

Water Availability Is Only the First Water Question in Data Center Site Selection

Evaluate water intake, thermal discharge, aquatic ecology and other permitting constraints before securing a site to reduce development risk and improve schedule certainty

Texas Unlocks Faster Path to OGI-Based LDAR Compliance for Oil & Gas

New TCEQ guidance signals a broader shift toward flexible, technology-driven emissions management

How Regional Energy Hubs Are Reshaping US Data Center Infrastructure

Pennsylvania emerges as a model for energy-first data center development