Sioux City: 712-252-5132

Serving the Tri-State Area

Certified Testing Services Inc - Logo

Storm Lake: 712-213-8378

Highway Sieve Shaker

CTS has a full service aggregate testing laboratory with the latest equipment. Our certified technicians will perform laboratory testing, field inspections, and field testing to assure that the project inspections are being met.

Full-service mineral aggregates analysis

Aggregate inspection services

  • Sieve analysis

  • Specific gravity and absorption

  • Deleterious materials

  • Iowa DOT-certified production testing

We have a fast turnaround time for reports. Call us today for your aggregate testing and inspection needs.

Sioux City:


or Storm Lake:


Improving roadway endurance one inspection at a time