TCEQ Exams

TCEQ Certification Exams

The Texas Commission on Environmental Quality (TCEQ) strives to protect our state's public health and natural resources consistent with sustainable economic development. College of the Mainland offers TCEQ certification exams through Computer Based Testing.

The following is required for TCEQ Exams:

  • Schedule an exam time: Book Online Now
  • $29 service fee per exam.
  • A valid/current picture ID is required for all exams

It is the candidate’s responsibility to ensure they have received an approval letter prior to requesting an appointment.

TCEQ website:

Available Exams

The exams available to be administered at College of the Mainland Testing Center are:

  • Customer Service Inspectors
  • Landscape Irrigation
    • Landscape Irrigation Inspector
    • Landscape Irrigation Technician (English Only)
  • On-site Sewage Facility (OSSF)
    • OSSF Maintenance Provider
  • Wastewater Treatment and Collection System Operators
    • Class I Wastewater Collection System Operator
    • Class B Wastewater Treatment Facility Operator
    • Class C Wastewater Treatment Facility Operator
    • Class D Wastewater Treatment Facility Operator
  • Water Treatment and Distribution System Operators
    • Class B Groundwater Operator
    • Class B Surface Water Operator
    • Class B Water Distribution
    • Class C Groundwater Operator
    • Class C Surface Water Operator
    • Class C Water Distribution
    • Class D Water
  • Water Treatment Specialists
    • Class III
    • Class II
    • Class I

Each of the exams above have a three-hour time limit.

  • Municipal Solid Waste Operator Class A – four-hour time limit
  • Municipal Solid Waste Operator Class B – two-hour time limit

Application Process


Pre-approval of your licensing application is required. For pre-approval, applicants must:

  • complete license requirements—
    • education
    • experience
    • training
  • submit an application with the $111 processing fee to TCEQ Occupational Licensing, MC-178, PO Box 13087, Austin, TX 78711-3087
  • To obtain an application, go to the CBT Application Request Form and submit your request. An application packet will be mailed to you upon receipt of your request.

Approval Letter

Upon receiving an approval letter, the applicant will need to:

  • make an appointment with a registered test center to take the exam (by phone or email)
  • pay a nominal fee to the test center


Retesting by CBT after failing a written test is allowed, so long as your application is in an approved status.

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