TCEQ Wastewater Collection Class I Practice Test
Original questions written to TCEQ’s Need-to-Know Criteria for this license, every option explained.
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203 original TCEQ Collection Class I questions with explanations · 100-question practice exam · 7 subjects
TCEQ Collection Class I exam format
The Texas Commission on Environmental Quality licenses wastewater operators. Class I is the entry collection license; its Need-to-Know Criteria cover statutes and design criteria, wastewater characteristics and treatment, safety and traffic control, collection facilities, construction, inspection, operation, pumping, equipment maintenance, management and math. You need 70 percent to pass, at a TCEQ-approved computer-based testing center.
- Subjects (TCEQ Need-to-Know)
- Statutes, rules, management and general information, Safety and traffic control, Wastewater characteristics and treatment, Collection facilities and construction, System inspection and operation, Pumping and equipment maintenance, Math
- Where
- At a TCEQ-approved computer-based testing (CBT) center after TCEQ approves your application; scores are immediate
- Passing score
- 70 percent
- Fees
- TCEQ application $111 ($74 provisional Class D); each CBT center sets its own testing fee
- Allowed aids
- A non-programmable calculator; scratch paper from the proctor. No books or notes
- Questions and time
- TCEQ does not publish the number of questions or the time limit for this exam
- Requirements
- High school diploma or GED; no work experience
- Required training
- Wastewater Collection
What’s on the TCEQ Collection Class I exam
TCEQ lists these subjects without question counts. Our practice exam gives each subject an equal share; each row links to the free topic drills that practice it.
| Subject | What it covers | Our practice exam | Drill |
|---|---|---|---|
| Statutes, rules, management and general information | TCEQ authority, Chapter 217 design criteria, management and health effects | 15 | Permits and rules drillManagement drill |
| Safety and traffic control | Physical, chemical and biological hazards and traffic control devices | 15 | Safety drill |
| Wastewater characteristics and treatment | What wastewater is and how plants treat it | 14 | Primary treatment drillActivated sludge drillFilters and ponds drill |
| Collection facilities and construction | Gravity system parts, materials, construction, repair and rehabilitation | 14 | Collection maintenance drill |
| System inspection and operation | Inspection methods and equipment, cleaning and maintenance | 14 | Cleaning and inspection drillI/I and overflows drill |
| Pumping and equipment maintenance | Pumps, lift stations and equipment upkeep | 14 | Lift stations drillPumps and equipment drill |
| Math | One- and two-step problems on flow, pumping and construction | 14 | Wastewater math drill |
How to take the TCEQ Collection Class I exam
- Complete the required training (Wastewater Collection) and meet the education and experience rules.
- Submit the TCEQ application and $111 fee (online through OLEA or by mail).
- Once TCEQ approves the application, schedule the exam at a TCEQ-approved computer-based testing center and pay its testing fee.
- Score 70 percent or more; results are immediate, and some centers offer one retest the same day.
Common questions
What is on the TCEQ Wastewater Collection Class I exam?
TCEQ's Need-to-Know Criteria list the subjects: Statutes, rules, management and general information, Safety and traffic control, Wastewater characteristics and treatment, Collection facilities and construction, System inspection and operation, Pumping and equipment maintenance, Math. TCEQ does not publish how many questions each subject gets.
What score do I need to pass?
TCEQ requires a minimum score of 70 percent.
How many questions are on the exam?
TCEQ does not publish the question count or time limit for this exam. Our practice exam has 100 questions on a 3-hour clock so you can practice at full length.
What can I bring to the exam?
A non-programmable calculator. The proctor supplies scratch paper and collects it. Phones, books and notes are not allowed.
Are these the real TCEQ questions?
No. TCEQ prohibits sharing or copying exam content. These are original questions written to TCEQ’s published Need-to-Know Criteria, with an explanation for every option.
Ready for exam day?
100 questions across the published subjects, with a score for every area and an explanation for every option.
Or start with a free ten-question drillMore Texas exam practice
One water operator pass covers every practice exam on the site.
Requirements, subjects, fees and pass mark checked November 2026 on tceq.texas.gov: TCEQ: Wastewater Treatment Plant and Collection System Operators · TCEQ: What applicants for wastewater licenses need to know · TCEQ: Licensing exams (computer-based testing, authorized aids) · TCEQ: Continuing education hours to renew by license type (PDF).
Game Assessment Prep is an independent practice site, not affiliated with or endorsed by Water Professionals International (WPI, formerly ABC), the California State Water Resources Control Board or the Texas Commission on Environmental Quality. Every question is original; none is taken from a certification exam, an official study guide or another prep provider.