Certified Operators

Certified water and wastewater operators are essential for the protection of public health and the environment. Ohio EPA's Operator Certification program has certified more than 12,000 operators, ensuring public water and wastewater systems are operated by properly trained and qualified individuals.  Learn how to become a certified water or wastewater operator.

The Operator Certification Unit is excited to announce the launch of our services in the Ohio EPA eBusiness Center. Training Providers can now electronically submit Contact Hour Course applications, schedule upcoming courses, and document operator attendance at their approved courses. This is a brand new feature for Operator Certification, please see the "eBiz" tab below for more information or click here for some of our most frequently asked questions.

Exam Information

Filling in answers on an answer sheet

Exam Dates and Deadlines


    • Class A, I, II and III Applications for Water and Wastewater Certification
    • Important exam application reminder:
      All currently certified operators must include their supervisor's information and signature in the "Supervisor Information" portion of the exam application. Any applications received without this information will automatically be considered for an operator in training (OIT).

Approved Examination Providers

Ohio EPA is pleased to announce alternative water and wastewater operator certification examinations, which are available more frequently and in more locations than Ohio EPA’s traditional paper and pencil testing. The State of Ohio has approved the Association of Boards of Certification (ABC) as an approved examination provider. Operators may now choose to take an ABC examination and then seek State of Ohio certification for all levels of certification except Class IV. ABC examinations will be offered in Cleveland, Cincinnati, Columbus, Dayton and Toledo. Ohio EPA will continue to offer paper and pencil examinations in Columbus in the spring and fall of each year. Applications for the traditional paper and pencil testing are available above. If you have any questions, feel free to contact the operator certification unit at 1-866-411-OPCT (6728) or by email. To find out more about the ABC certification program, please visit ABC's Ohio Certification website.

Class IV Certified Operator Exam Information

Training Courses and Experience Credit

Study Materials

Need-to-know Criteria

The following documents provide need-to know criteria that test-takers will be expected to know for each type of certified operator exam.

Young man taking a test


Those taking the certified operator exam will be expected to know the formulas provided in the appropriate document below (e.g., those taking the wastewater operator certification exam should consult the "wastewater formulas" document).


A number of helpful references have been compiled to assist those studying for Ohio EPA operator certification exams. These references are only intended as a resource and are not required to be purchased in order for individuals to pass their exams. 

Anyone Can Submit an Exam Question Suggestion

The Division of Drinking and Ground Waters accepts exam question suggestions. Complete and submit the Ohio EPA Operator Certification Exam Question Submittal Form provided below.  Instructions for submitting the form are included in the document.

    • Ohio EPA Operator Certification Exam Question Submittal Form [PDF] or [Word]

Operator Certification eBusiness Center

Welcome to the Ohio EPA Operator Certification Unit eBusiness page. Operators will now be able to access their operator profile, update contact information, view completed courses, submit a variety of applications and even pay program fees electronically. Training Providers will be able to update program contact information, apply for courses, upload course schedules and upload course attendance information for operators. Online access to our more popular applications, payments, and features should streamline the paperwork process and provide the most information in the least amount of time to Ohio’s Operators and Training Providers. Visit the eBusiness Center and use the following links to get started.

  • How do I get an eBusiness account?
    • NOTE: If you are a Training Provider that had valid contact hour course approval numbers on or before August 1, 2014 you may already have an account. Please contact Operator Certification before creating a new account.

  • How do I request a PIN?
  • How do I request a service?
    • Operator Service
      • NOTE: If you have a certificate, or if you have ever applied for an exam, certificate, or OIT status with Ohio EPA, you have a Core Person ID number. Your core person ID is the middle seven digits of your certification number. If you are not sure of your core person ID please contact the operator certification unit at 1-866-411-OPCT (6728) before selecting "No" and creating a new Core Person ID number.
    • Training Provider Service
    • Exam Provider Service


​Ohio EPA Training Providers

The following eBusiness links should be used by new Training Providers and those Training Providers who currently submit Contact Hour Course Approval Applications to Ohio EPA for each course. These course approval numbers are generated by Ohio EPA with the "OEPA" prefix and can be found on the approved course list on our website.

Approved Contact Hour Training Providers

Approved Contact Hour Training Providers (ACHTPs) are training providers who have received authority from Ohio EPA to issue their own unique course approval numbers without having to submit individual course applications. Training providers will be given the option to apply for the ACHTP program in eBusiness once they have provided a minimum of 12 Ohio EPA-approved contact hours for at least three years. ACHTPs submit monthly training calendars to Ohio EPA by the first of the month for each month they are conducting training.

Contact Hours and Renewals Information

Important reminder: At least half of the contact hours for renewals of certificates must be directly related to operations and maintenance (OM). For answers to more contact hour and renewal questions, please review the Contact Hour and Renewal Applications - Frequently Asked Questions document.

Contact Hours Forms 

    • Contact Hour Course Approval Forms
      • Contact Hour Course Approval Application Word (rev. February 2015)
      • Example Course Completion Certificate (Form E) [Word]
    • Renewal Form Back Page (Word) (PDF)

Approved Courses

Ohio’s certified operators are required to complete contact hour training to renew their certificates. A number of courses have been pre-approved by Ohio EPA. These “OEPA” numbers are generated by our Agency for contact hour use, and will appear in the following lists. Courses are also being approved by our Approved Contact Hour Training Providers (ACHTPs), and these courses will NOT appear on the following lists. If you have taken a course from an ACHTP, please see the list of Approved Contact Hour Training Providers and contact them directly for course approval information.  

Notice: Effective Jan. 1, 2014, we will no longer be accepting Montana State University CD-ROM courses for contact hour credit. Most of these courses are 10 years old or older, there is no technical support for them and operators have experienced significant difficulties tracking the hours they have completed. If you need additional contact hours for your operator certification renewal, please view our approved course lists above for options or take a look at the FREE Class A Water Supply and Class 1 Water Supply training.

Training Providers

Approved Contact Hour Training Providers (ACHTPs) have received authority from Ohio EPA to conduct contact hour courses without having to submit a Contact Hour Course Approval application to the Operator Certification Unit for each course. These ACHTPs have the ability to assign their own unique approval number and contact hours to each course they offer. Training providers who are not included in the List of Approved Contact Hour Training Providers may still provide contact hour courses by getting each individual course approved by the Ohio EPA.

Operator Certification Exam Results

Click on a date below to see that month's operator certification exam results, high scorers list and pass list. Individual scores will be mailed approximately 30 days after the exam. The overall results, high scorers list and pass list will be posted below approximately five to six weeks following the exam.  

Important Reminder: No scores will be provided over the phone at any time.   

Phone: (614) 644-2752
Fax: (614) 644-2909

Email Webmaster

Physical address:
Lazarus Government Center
50 W. Town St., Suite 700
Columbus, OH 43215

Mailing address:
Lazarus Government Center
50 W. Town St., Suite 700
P.O. Box 1049
Columbus, OH 43216-1049 

Operator Certification Contacts 
Operator Certification Hotline (866) 411-6728
Barienbrock, Andrew
(614) 728-1216
Davis, Deidra (614) 644-2029
Dingman, Jessica (614) 728-1226
Parkins, Susan (614) 644-2888


Operator Certification Advisory CouncilPeople participating in a meeting

The Operator Certification Advisory Council is a group of experts in the fields of water and wastewater treatment established by Ohio Administrative Code (OAC) Rule 3745-7-10. The council provides guidance and input to Ohio's water and wastewater operator certification program. Members of the council include four Class III or IV operators (i.e., two water supply and two wastewater treatment), two actively employed sanitary or environmental engineers and two Ohio EPA members (i.e., one representing public water systems and one representing wastewater systems).

Meeting Schedule

All council meetings are held at 9 a.m. at the Ohio Environmental Protection Agency, Lazarus Government Center, 50 W. Town St., Columbus, OH. 

Meeting Minutes

Operator Lists

Certified and Contract Operator Lists

Man recording data

Ohio EPA maintains lists of certified operators, contract operators and expired operator certificates across the state.

To request to be added to the contract operator list, complete the request form below and submit the completed form via email, fax or mail to the contact listed in the form.

    • Request to be included in Ohio EPA's List of Contract Operators PDF or Word

Operator of Record Lists

Ohio EPA also keeps a list of the operators of record for the following systems:



Rules and Enforcement

Operator certification rules can be found in Ohio Administrative Code (OAC) Chapter 3745-7. To view recent operator certification enforcement actions taken by the Division of Drinking and Ground Waters, please visit the Enforcement page

Forms and Resources

    • Operator in Training (OIT) Documentation Form [PDF or Word or Word Fill-in]
      • Use this form to document work experience as an operator in training.
    • Reciprocity Application
      • Use this form to apply for reciprocity. The Director may grant certification by reciprocity to an applicant holding a valid certificate or license from another state or province. 
    • Operator of Record (ORC) Notification Form [PDF or Word]
      • Use this form to update Ohio EPA with operator of record information (e.g., hired a new ORC, hired an additional ORC, remove a previous ORC, make changes to an existing ORC's information). 
    • Request for Public Water System (PWS) Reclassification [PDF or Word]
    • Minimum Staffing Reduction Request Form [PDF or Word]
      • Use this form to request a reduction in minimum staffing hours.

Operator Job Analyses

The following documents include general knowledge and skills that certified operators should have at each classification level. 

Water and Wastewater Career Opportunities

Are you interested in a career in water or wastewater? Ohio needs water and wastewater operators and more jobs are available every day. There are many utilities and professional organizations that maintain lists of current job postings. Clicking the link below will direct you to a list of sites we have compiled. You may also wish to search postings for your city, county, township or other wastewater or public water systems in your area by contacting those utilities directly. If you are a business or municipality who would like to add your job search website to this list, please contact the Operator Certification Unit. (Note: We are not posting individual job opportunities at this time.)




Call the Operator Certification Hotline at 1-866-411-OPCT (6728) or email us.

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