Sioux City: 712-252-5132

Serving the Tri-State Area

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Storm Lake: 712-213-8378

Asphalt control Shadow Concrete reporting Aggregative inspection GEO Rig 1

The foundation to any construction project begins with attaining accurate information on the site's subsurface.

You can trust Certified Testing Services Inc for a fast turnaround time on your reports. We have over 30 years

of experience in this industry and maintain a level

of professionalism that is unmatched.

Schedule your geotechnical testing today

Paving the path for geotechnical engineering professionals