Certification Prep

Get ready for your wastewater operator exam with class prep courses, free practice quizzes and free exam math tools.

Choose your state

Indiana class prep courses are open now. Other states are coming.

Indiana
Live
Class I and II, Class III and IV, and Industrial Class C and D.
Oregon
Coming
Washington
Coming
California
Coming
Hawaii
Coming

Want your state next? Tell us which exam you are preparing for.

Indiana class prep courses

Online and self-paced: rules, math, process control, solids, lab and safety for each exam level. Choose a class to see what it covers and to register.

Class	Length	Price	CEU credit
Indiana Class I and II Certification	12 hours	$200	CEUs available where approved
Indiana Class III and IV Certification	16 hours	$240	CEUs available where approved
Indiana Industrial Class C and D	6 hours	$180	CEUs available where approved

Free practice quizzes

Try a few questions before you take a class. No sign-up.

Activated Sludge practice quiz

Ten questions on activated sludge control: internal recycle, MCRT and sludge age, settleometer practice, clarifier loading, F/M, permit limits and aeration.

Start the activated sludge quiz

Operator math practice quiz

Ten operator math questions of the kind found on certification exams: area, overflow and weir rates, detention time, volume, alkalinity, digester solids, volatile solids reduction, retention time and methane.

Start the operator math quiz

Practice quizzes do not give a certificate. Each online class has its own certification quiz; pass it to get a certificate of completion.