User Name


How long will it take to review my application?

C2EP reviews applications on a first-in, first-processed basis with the goal of reviewing all applications within 30 days of receipt.

How long is a PO Certification valid?

Once issued, a PO Certification is valid for two years.

Will my certification work in my state/province?

C2EP recommends that all candidates check with their local certification or licensing authority to determine if reciprocity is available. C2EP uses the ABC Standardized Exams for all certification programs – the same exam that is used by many state and provincial authorities.

What are the fees?

Current fees are as follows:


All fees are in U.S. Dollars, non-refundable, non-transferrable, and subject to change without notice. State and local taxes may apply. Unless otherwise noted, all fees are payable to ABC.

PO Certification Application Fee

Application submitted through PO Certification Portal


Application submitted outside of the PO Certification Portal


Examination Fee, US Locations (Payable to AMP)


First examination attempt per application


Second and subsequent examination attempt per application


PO Recertification Application Fee

Application received 90 days or more in advance of expiration


Application received less than 90 days in advance of expiration


Application submitted outside of the PO Certification Portal


Other Fees


Returned Check


Replacement Document


What forms of payment are acceptable?

C2EP accepts credit and debit cards via the PO Certification portal (Visa, MasterCard, American Express, and Discover, only). Funds may be accepted outside the PO Certification Portal by other means, for an additional fee.

Payments for AMP services are paid via credit or debit card at the time of scheduling. Alternately, payment by money order may be made by special arrangement with AMP.

What is the format of examination questions?

C2EP uses only multiple-choice questions. Most questions have four options (one correct answer and three distractors).

How should I prepare for the exam?

C2EP recommends that you review the Examination Preparation page for the certification you are seeking. This page will provide you with information on the appropriate Need-to-Know Criteria, Formula/Conversional Table, reference materials, study guides, sample questions, and other materials that may be available to aid you in preparing for the exam.

PO Wastewater Collection Examination Preparation

PO Wastewater Treatment Examination Preparation

PO Water Distribution Examination Preparation

PO Water Treatment Examination Preparation

How do I prepare to take a computerized exam?

Candidates can watch this video to learn about what to expect on their test day.  The video provides a general overview of the testing process, but for specific information, please review the details on the Examination Process page for the certification you are seeking.

PO Wastewater Collection Examination Process

PO Wastewater Treatment Examination Process

PO Water Distribution Examination Process

PO Water Treatment Examination Process

Do I need to purchase C2EP courses or materials to prepare for the exam?

C2EP does not offer preparatory courses or materials, and no specific course or study guide is required. For candidates who desire a study guide, C2EP recommends those produced by AWWA and WEF.

May I use a calculator?

Candidates may use a silent, non-programmable calculator without alpha keys or printing capabilities. A Formula/Conversion Table will be provided to you at the time of testing.

What is Applied Measurement Professionals (AMP)?

AMP is a company that partners with C2EP to administer C2EP examinations. AMP will work with the candidate to schedule the examination at an AMP testing facility. AMP staff administer, proctor, and monitor the examination process. AMP does not develop exam content or certification criteria, and does not influence certification decisions.

I did not pass the exam. How can I better prepare?

The score report you received at the test center includes a diagnostic report indication your strengths and weaknesses in exam areas. Cross-reference this report with the appropriate Need-to-Know Criteria (available on the Examination Preparation page for the certification you are seeking) to identify topics for further study.

PO Wastewater Collection Examination Preparation

PO Wastewater Treatment Examination Preparation

PO Water Distribution Examination Preparation

PO Water Treatment Examination Preparation

I believe that an exam question contains and error? What should I do?

Candidates may submit comments about exam questions during the exam session by clicking on the button displaying an exclamation point (!). This opens a dialogue box where comments may be entered. Comments will be reviewed, but individual responses will not be provided and scores will not be adjusted. Comments are only accepted at the time of the exam.

Something went wrong at the testing center. What should I do?

Immediately report the issue to the AMP staff person monitoring your exam. AMP will work with you to resolve the issue or refer the issue to C2EP. Please note that C2EP will not change candidate score results.

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C2EP is committed to protecting public health and the environment through certification and professional designation of water industry professionals.
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