Onterris, Inc. is a global environmental solutions company. It operates through the following segments: Assessment, Permitting and Response, Measurement and Analysis, and Remediation and Reuse. The Assessment, Permitting and Response segment provides scientific advisory and consulting services to support environmental assessments, environmental emergency response and recovery, toxicology consulting and environmental audits and permits for current operations, facility upgrades, new projects, decommissioning projects and development projects. The Measurement and Analysis segment focuses on provision of environmental testing and laboratory services in North America. The Remediation and Reuse segment provides clients with engineering, design, and implementation services, primarily treatment technologies that treat contaminated water and remove contaminants from soil. The company was founded in 2012 and is headquartered in North Little Rock, AR.