Center for Toxicology and Environmental Health: North Little Rock, Arkansas Based Environmental Company Rebrands to Onterris
May 28, 2026
By:
Walter G. Wright
Category:
Arkansas Environmental, Energy, and Water Law
Arkansas Environmental, Energy, and Water Law
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The Center for Toxicology and Environmental Health (“CTEH”) announced that it is rebranding to the name Onterris. CTEH has been since 2022 part of the Montrose Group of companies.
The company’s corporate headquarters is in North Little Rock, Arkansas.
Montrose has operated as a collection of companies which include:
- ECT2
- ENTHALPY Analytical
- Pic Environmental
- Montrose Air Quality Services
- Montrose Environmental Services
- Spirit Environmental
- TwoDot Consulting
These companies will now unify as one brand.
Onterris describes itself as a:
… leading global environmental solutions company partnering with organizations to solve complex challenges where environmental pressors, regulatory expectations and operational risks intersect.
This is stated to be done by integrating services that include:
- Consulting
- Emergency response
- Laboratory testing
- Emissions testing
- Treatment technology
CTEH was founded a number of years ago by four PhD toxicologists associated with the University of Arkansas for Medical Sciences. Department of Pharmacology and Toxicology.
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