Massachusetts Wastewater Operator Certification Exams

NEIWPCC is responsible for the Massachusetts wastewater operator certification examinations. Beginning in July 2009, NEIWPCC, working with ABC and the Massachusetts Board of Certification, began offering computer-based versions of the certification exams through AMP (now PSI).

Certification examinations for Massachusetts Operators are now ONLY offered at PSI/AMP testing locations. As of January 2018, there are now eight locations in Massachusetts as well as testing centers in RI, NH, and NY.  (Note that the in-person appeal process and exam review is no longer available.)

Preparing for a Wastewater Exam

To assist in your preparation for a Massachusetts Municipal or Industrial Wastewater Certification Exam, you may view and/or download the Massachusetts Wastewater Operator Training Exam Reference.

For recommended (but not required) preparation (training) for taking a wastewater Operator license exam, you may view and/or download this 2-page Exam Prep document.

To view and try out some sample exam questions or to learn about the exam software, go to:

For logistics and more info to help prepare for a computer-based wastewater exam, go to:

For what to expect when you go and take a computer-based wastewater operator exam, here is a PSI Test Center Experience video.

To Schedule an Exam

View/Download information HERE to schedule a computer-based exam directly with PSI/AMP. You no longer need to contact NEIWPCC in order to take an exam. Exams will only be administered at PSI/AMP testing centers and are by appointment only. The following PSI/AMP testing centers are available in Massachusetts: Holyoke, Saugus, and Framingham.

To Obtain a Wastewater License

Once you have obtained a PASSING grade on the computer-based exam, you must download the computer-based exam license application form and submit it to NEIWPCC with (a copy of) your PASSING exam results and license fee. NEIWPCC will then issue your new Wastewater Operator license.

There is no need to contact NEIWPCC for non-passing exam results. You may schedule and re-take another computer-based exam at any time.


For questions and information related to Massachusetts certification please view our short webinar, Becoming a Certified Wastewater Operator in Massachusetts. The slides in this webinar may be viewed separately here.

Other Certifications

Upgrade to Combined Grade 7 – Massachusetts Wastewater Treatment Plant Operator

Note: The Grade 7 Upgrade Application must be mailed to the Commonwealth of Mass, as shown on the form.

Past Exam Results

View wastewater exam summary statistics of quarterly current and annual past exam results HERE.

Training Contact Information

For general questions on Training, please contact us at 978-323-7929 or

For any last minute changes or cancellations due to weather, location, or instructor illness, please call our

24-Hour Training and Event Hotline at 978-349-2345.