Drinking Water Regulations Practice Questions

Regulations and administrative duties are 15 questions on California T1–T3 and 35 on T4. Practice the federal rules and the California and Texas rules operators work under.

Take the TCEQ Class D Water practice exam

100 questions across the published subjects, with a score for every area and an explanation for every option.

Or try the free regulations drill
  • 43 original regulations questions, every option explained
  • Tested on 16 of our 25 practice exams
Free sample · Question 1 of 3Regulations

What minimum score is needed to pass a TCEQ occupational licensing exam?

Choose the best answer

What our regulations questions cover

  • The SDWA, primacy, MCLGs, MCLs and secondary standards
  • RTCR, Ground Water Rule, Lead and Copper Rule and nitrate
  • SWTR, IESWTR and LT2 turbidity and log removal; Stage 2 DBP compliance
  • Public notification tiers, CCRs and record retention
  • California certification and Waterworks Standards; Texas 30 TAC Chapters 30 and 290
Line drawing of a clipboard checklist, a cooler of capped sample bottles, a binder and a laptop with a blank bar chart at a water plant

This list is our own summary, written for practice. The exam owners publish their outlines: California’s Expected Range of Knowledge, TCEQ’s Need-to-Know Criteria and WPI’s Need-to-Know Criteria.

Drill regulations, then sit a full practice exam

Take the TCEQ Class D Water practice exam

100 questions across the published subjects, with a score for every area and an explanation for every option.

Or try the free regulations drill

Ideas the questions test most

  1. Tier 1 notice within 24 hours; Tier 2 within 30 days; Tier 3 within one year.
  2. Nitrate 10 mg/L as N; arsenic 0.010 mg/L; TTHM 0.080; HAA5 0.060 mg/L.
  3. Texas: at least 0.2 mg/L free chlorine or 0.5 mg/L total chlorine for chloramines.
  4. California certificates are valid three years.

Start the free regulations drill · TCEQ Class D Water practice test · California T1 practice test · California T2 practice test · California T3 practice test · California T4 practice test · California D1 practice test

Common questions

Do the questions cover California and Texas rules?

Yes. State questions are marked by the state name in the stem. California and Texas exam mocks draw their own state’s questions plus the federal ones; WPI mocks use only federal and general items.

How is TTHM compliance calculated?

Under the Stage 2 DBP Rule, as a locational running annual average at each monitoring site; each must meet 0.080 mg/L.

Take the TCEQ Class D Water practice exam

100 questions across the published subjects, with a score for every area and an explanation for every option.

Or try the free regulations drill

More operator topics

Outlines used for these questions: Expected Range of Knowledge, Drinking Water Treatment Exam (rev. 4/2020, PDF) · Expected Range of Knowledge, Drinking Water Distribution Exam (rev. 4/2020, PDF) · TCEQ: Need-to-Know Criteria for public water system operators · TCEQ: What applicants for wastewater licenses need to know · WPI: 2025 Need-to-Know Criteria.

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.