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Wastewater Operator Certification



All wastewater treatment facilities in Delaware must be operated under the direct supervision of a Delaware Licensed Wastewater Operator.

The Department of Natural Resources and Environmental Control administers the certification program with advice and assistance from the Board of Certification For Operators of Wastewater Facilities. The program is governed by the Regulations for Licensing Operators Of Wastewater Facilities (7 DE Admin. Code 7204).

At the start of each year, all wastewater facilities in Delaware must report the names of all Delaware Licensed Wastewater Operators to the Department using a Section 4.04 Report Form. They must report any personnel changes involving Licensed Operators, within 30 days after the change.

To become a licensed wastewater operator, applicants must first pass an exam and then submit an application. Applicants can apply for the exam, and for a license, using the Digital DNREC ePermitting system.

Those unable to take advantage of the Digital DNREC ePermitting system can contact the Division of Water at 302-739-9116.

The Exam

The exam is offered twice each year on the Terry Campus of Delaware Technical and Community College, in Dover. Applicants must register in advance through the DNREC ePermitting System.

There is a separate written exam for each level of license. The exams are made up of multiple-choice and true/false questions. Applicants must earn a score of 75 percent or higher to pass.

Exam results will be sent to applicants by mail within four to six weeks. Scores are valid for three years from the date of the exam. (Note: a passed exam does not mean the applicant is a licensed wastewater operator)

License Applications

Applicants who have passed the exam may submit an application for certification, along with their educational transcripts, using the DNREC ePermitting System.

Applicants who do not meet the experience or the educational requirements may, with the approval of the Board, receive an Operator-In-Training (OIT) license.

Applicants who hold certifications or licenses from other states, where requirements are found to be equal to Delaware’s requirements, may apply for certification in Delaware under the state’s reciprocity provision.

Continuing Education Training

Wastewater operator licenses are issued for a two year period. To renew, applicants must provide proof of at least 20 hours of approved training during the two years. A minimum of ten hours must be directly related to wastewater facility operations or maintenance. Up to ten hours may be indirectly related courses that are approved by the Board of Certification For Operators of Wastewater Facilities. Duplication of directly related courses in consecutive renewal periods is not allowed.

The Board maintains a list of approved and denied courses available in multiple locations and online from dozens of vendors.

To have a continuing education course added to the approved provider list, please contact the licensing program at 302-739-9116.

Wastewater Operator Licensing Overview Brochure

Delaware Technical & Community College Environmental Training Center

Delaware Rural Water Association

Water and Waste Operators Association of Maryland, Delaware and District of Columbia




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