Pricing

One-time pricing. No subscription.

Every bank includes the complete question set, untimed practice by content area, timed mock exams in the real blueprint proportions, a worked explanation and source citation on every question, and free updates whenever the bank is re-verified. Start with the free 25-question sample — it's the same player and the same verification standard as the paid banks.

Now open. Checkout is live via Stripe. Your personal access code for the player is delivered by email to the address you check out with.

Single exam bank

$49 one time
  • One complete bank (Water Treatment Class I: 326 questions)
  • Practice by content area, with instant feedback
  • 110-question timed mock exams, scored at the 70% pass mark
  • Worked explanations and source citations on every question
  • Free updates through each annual re-verification
Buy the Water Treatment Class I bank — $49 Already bought? Enter your code

All-access

$99 one time
  • Every current bank, plus every bank we publish later
  • Includes Wastewater Treatment I, Water Treatment II, and Distribution I as they launch
  • Everything in the single-bank tier, for every exam
  • The right choice if you're climbing the class ladder
Buy All-Access — $99 Already bought? Enter your code

The policy that matters

Find a verified wrong answer, get your money back

Every question in every bank passed two independent derivations of its answer key. If you still find one that's wrong, we want to know — every question in the player has a “Report an error” link.

  • What “verified” means: we re-check the question against the authoritative source it cites. If the source confirms the keyed answer is wrong — not a difference of interpretation or a different textbook convention, but wrong against the citation — the error is verified.
  • What happens then: we fix or retire the question, and we refund the purchase price of the bank it came from. No forms, no fight.
  • Why we can offer this: the Class I bank shipped with full key agreement on all 326 questions across two independent passes. We'd rather refund and fix than defend a bad question.

This policy covers the correctness of the answer key. It is not a pass guarantee: no practice product can promise a result on the real exam, and we don't.

For utilities and trainers

Buying for a crew?

If you're a utility, district, or training provider preparing several operators, all-access covers each operator's exams across their whole ladder. For team arrangements, email [email protected] and tell us how many operators you're preparing.