Sioux City

Sioux City Location

Certified Testing Services, Inc.

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Physical Address:

Mailing Address:

PO Box 1193

419 W 6th St.

Sioux City, IA 51102

Mon - Fri: 7:00 am - 5:00 pm
Sat - Sun: Closed

Saturday and Sunday Hours By Appointment Only

Holiday Hours

Thursday, November 28, 2024 : Closed
Wednesday, December 25, 2024 : Closed
Wednesday, January 1, 2025 : Closed
Monday, January 20, 2025 : Closed
Monday, February 17, 2025 : Closed
Monday, May 26, 2025 : Closed
Thursday, June 19, 2025 : Closed
Friday, July 4, 2025 : Closed
Monday, September 1, 2025 : Closed
Monday, October 13, 2025 : Closed
Tuesday, November 11, 2025 : Closed
Thursday, November 27, 2025 : Closed
Thursday, December 25, 2025 : Closed

Main Phone: (712) 252-5132

Fax: (712) 252-0110

Sioux City LOCATION

Location Details

Serving locations in Iowa, Nebraska, South Dakota, and Minnesota. Click here for more details.

Storm Lake LOCATION

1330 Michigan St

Storm Lake, IA 50588

Location Details

Business Hours

Mon - Fri: 7:00 am - 5:00 pm
Sat - Sun: Closed

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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