Montrose Environmental Group, Inc. (“Montrose”) is pleased to announce that on October 3, 2017, through its wholly-owned subsidiary Enthalpy Analytical, LLC, it acquired EnviroSystems, Incorporated (“ESI”). ESI will become a part of Montrose’s Measurements and Analytics Division and will further expand Enthalpy’s toxicology testing capabilities. Terms of the transaction were not disclosed.

Based in Hampton, New Hampshire, ESI specializes in providing environmental toxicological testing services to industry, consulting engineers and local, state and federal government agencies.

President and co-founder Petra Simon stated, “We are excited to add our capabilities and expertise to the Montrose network. We see the synergy of the companies in the network as a means to provide our clients with enhanced services and also give our clients the opportunity to take advantage of the network’s bi-coastal facilities.”

Steven Eckard, Senior Vice President of Enthalpy, commented, “We are excited to add ESI as our East Coast aquatic toxicology specialty lab. Aquatic toxicology is an important element to our strategy to provide a wide range of top tier laboratory services to engineering firms and other customers in the regulated community. ESI has a long track record of being a premier resource for toxicology and marine chemistry services. In addition to allowing us to serve a new geography, they add many years of experience plus deep scientific and regulatory knowledge to our existing toxicology assets.”

About EnviroSystems, Incorporated

EnviroSystems, Incorporated, established in 1992, is accredited under the National Environmental Laboratory Accreditation Program (NELAP) and offers a full range of environmental toxicological and chemical analytical services in support of ecological risk assessments, dredged sediment evaluations, effluent biomonitoring programs, leachate bioassays and industrial chemical evaluations. EnviroSystems is one of only two laboratories in the country to hold a Department of Defense environmental laboratory accreditation for toxicology.
For more information, visit

About Montrose Environmental Group, Inc.

Montrose Environmental Group, Inc. is a national, high-growth environmental services company offering Measurements and Analytics and Environmental Solutions services to a diverse range of clients in industry and government. Headquartered in Orange County, California, Montrose Environmental Group, Inc. has 47 offices and approximately 1000 employees nationwide.
For more information, visit