Hours:
Geotechnical Engineering &
Construction Materials Testing
At Certified Testing Services, Inc., we pride ourselves on being more than just a service provider; we're your partners in ensuring quality and reliability. With 36 years of rich experience under our belt, our journey has been one of dedication, skill, and unwavering commitment to our clients. Our client-centric approach is the cornerstone of our business, guiding every interaction and service we provide.
Fast, Accurate, and Reliable Results
Trusted Professionals
Locally Owned and Operated
Certified Laboratory
IOWA DOT
Nebraska DOT
Army Corps of Engineers
Valued Client Care
Geotechnical engineering involves analyzing earth materials to guide construction projects. Our experts assess soil, rock, and groundwater conditions to ensure foundations are safe, stable, and suitable for long-term development.
We offer comprehensive testing of construction materials, ensuring they meet stringent quality standards. From concrete to metals, our services guarantee the integrity, durability, and safety of materials used in your construction projects.
Serving Sioux City and Storm Lake, IA, Certified Testing Services, Inc. offers experienced and professional geotechnical drilling, geotechnical engineering, building material testing, aggregate inspections, and soil testing services.
We have offices in Sioux City and Storm Lake, IA. You can visit any of our locations, and our team will be there to help you. We have over 36 years of experience offering geotechnical drilling, geotechnical engineering, construction material testing, and more.
Serving locations in Iowa, Nebraska, South Dakota, and Minnesota. Click here for more details.
1330 Michigan St
Storm Lake, IA 50588
Saturday and Sunday Hours By Appointment Only
Serving locations in Iowa, Nebraska, South Dakota, and Minnesota. Click here for more details.
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