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Become Certified

Step 1: Study

You should be studying 20-30 hours for lower level exams, and 40-50 hours for upper levels. Failing means you will have to wait 30 days and do it all over again.

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Step 2: Choose your exam

Choosing a Grade Level to Test For

Depending on where you might be working, these are the certification levels needed for water system’s serving these populations:

Distribution Treatment

Small System: 25-500 population

Dist. Grade 1: 501-1,500

Dist. Grade 2: 1,501-5,000

Dist. Grade 3: 5,001-15,000

Dist. Grade 4: > 15,001

Treatment Grade 1: 25-1,500

Treatment Grade 2: 1,501-5,000

Treatment Grade 3: 5,001-15,000

Treatment Grade 4: > 15,001

Step 3: Pass the Exam

Bring to the exam:

  • Calculator (4 function calculator preferred)
  • Driver’s license or government ID
  • #2 pencil and eraser

Items not allowed during the exam:

  • No cellphones, laptops, or devices that can hold text allowed (like programmable calculators)
  • No phones as calculators
  • Books
  • Your own scratch paper or notes

Provided at the exam:

  • Sheet of math formulas and conversions
  • Scratch paper

Arrive 15 minutes early to check in and get instructions.

Step 4: Wait for your results

The state takes about four weeks to process your exam. Results are confidential and cannot be shared via email or phone, only by mail.

Step 5: Maintain your certification

Step 6: Keep your information up-to-date

Water Operator Job Listings:

Exam Feedback Survey

To improve the exam process for future operators, please tell us about your experience. Did you need more training on a specific topic? Have a recommendation? Let us know!


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