Wastewater Treatment Operator Class I
Study wastewater treatment, plant equipment, laboratory tests, and safe operation.
- Questions in this course
- 301
- The mock test
- 100 questions, 70 correct to pass, scored as one total — 39 checking and operating plant equipment; 38 checking and adjusting treatment; 10 testing wastewater samples; 13 safety, security, and records.
This course is for people preparing for a Class I wastewater treatment operator exam.
Apply through the certifying authority for the place where you plan to work. That authority sets eligibility and testing details.
Official links
Questions
Common questions
Is there an official test, and how is the mock test scored?
This 100-question mock follows the standardized Class I outline. Its 70-of-100 practice target is our choice because certifying authorities set their own pass rules. 100 questions, 70 correct to pass, scored as one total — 39 checking and operating plant equipment; 38 checking and adjusting treatment; 10 testing wastewater samples; 13 safety, security, and records.
How are the questions checked?
Every question is checked before it goes live, and again each time the site is updated.
Where do I take the EPA 608 test?
Apply through the certifying authority for the place where you plan to work. That authority sets eligibility and testing details.
Is this course free?
Part of every course is free: a slice of every topic and one short practice test a day. Full access is $10 a month for one course, or $20 a month for every course on the site.