Hartford – SMA

St. Louis skyline

Enhancing Terracon’s environmental services offerings and expertise in the Upper Midwest region, St. John-Mittelhauser & Associates, A Terracon Company (SMA), leverages decades of experience to deliver environmental consulting, investigation, remediation, data management and 3D visualization solutions to clients. SMA serves clients including industrial manufacturers, insurance companies, real estate developers, state and local agencies, and energy companies.

Terracon is an employee-owned consulting engineering firm providing environmental, facilities, geotechnical, and materials services. We offer clients across the country practical cost-effective solutions from more than 140 offices. By anticipating project requirements and adapting to challenges, we make it easy for you to work with us. We approach every project – large or small – with your business objectives in mind. This focus results in projects being completed accurately and on schedule.



201 E. Hawthorne St. Hartford, IL 62048
Phone: (618) 216 3434
Fax: (618) 216 3438