Water & Wastewater Operator Certification in Maryland

Your path to certified in Maryland

1. One board does it all. The Board of Waterworks and Waste Systems Operators, inside the Department of the Environment, certifies drinking water, wastewater, and industrial wastewater operators. There is no separate wastewater board.
2. Find your classification. Five categories hold 23 classifications: treatment and distribution on the drinking water side, treatment and collection on the wastewater side, and industrial wastewater works, each with its own exam. Three designations stack on top: operator-in-training, operator, and superintendent.
3. Apply, then test. Exams are aligned to the national bank and delivered by computer at PSI sites, or on paper at the operators association's short courses. Apply to the board at least 21 days ahead with the $50 exam fee; you pass at 69.5 percent.
4. New for renewals: cybersecurity training. As of July 1, 2025, every operator must complete the EPA cybersecurity training to renew. It is the headline change.
5. Renew every three years. The fee is $50 per certificate category, capped at $100 if you renew everything together, plus continuing-education units that scale with your class (16 to 30 over the period).

The exams test standard operator math. Drill it free in the practice tool before you book a PSI seat or a short-course sitting.

Drinking water: Maryland Dept of the Environment, Board of Waterworks and Waste Systems Operators program page

Who runs certification here

The Board of Waterworks and Waste Systems Operators sits in the Department of the Environment's Water Management Administration, and it is genuinely one board for everything: drinking water treatment and distribution, wastewater treatment and collection, and industrial wastewater works. Authority runs through Title 12 of the Environment Article, with the detailed rules at COMAR 26.06.01. That single-board structure is unusual; most states split drinking water from wastewater or run parallel boards.

The grades and what they cover

Maryland runs five categories holding 23 classifications, each with its own process-specific exam. Water treatment runs Classes 1 through 5 plus a no-chemical-treatment G class; water distribution is a single class; wastewater treatment runs Classes 1 through 6 plus solids-handling and advanced add-ons; wastewater collection runs Classes 1 and 2; and industrial wastewater works runs Classes 1 through 7. Your classification is driven by the facility you operate.

Across all categories, three designations apply: operator-in-training for those building experience, operator for the fully certified, and superintendent, a separate tier that starts as a one-year certificate and then renews for three.

The exam: logistics, not cramming

The board sets need-to-know criteria per classification and aligns the exams to the national bank. You can sit by computer at PSI test centers (which add a site fee on top of the $50 board fee) or on paper at the operators association's annual short courses. Either way you apply to the board at least 21 days ahead, and the passing score is an unusual 69.5 percent. One note for budgeting: an older application form still names a retired testing vendor, but PSI is current.

For what each classification's exam covers, the what's on the exam guide is the place to start.

Keeping it current (renewal)

Certificates run three years from the date of issue. The renewal fee is $50 per certificate category or type, but it caps at $100 when you renew everything together, so operators holding many certificates do not pay without limit. Continuing-education units scale by class under the board's table, from 16 units for the lower classes, collection, and distribution up to 30 for higher treatment classes, with superintendents adding 7 and most categories requiring at least half the units be process-related.

The recent addition: since July 1, 2025, the EPA cybersecurity training is a renewal requirement for all operators. Late renewal adds $100 within 90 days; reinstatement runs $150 within two years and requires catch-up training.

Training and continuing education

Training must be approved through the board's training-review process. The Maryland Rural Water Association is the small-system anchor, with credit-hour courses (online and in person), circuit-rider technical assistance, and a two-year apprenticeship that ends in certification. The Maryland Center for Environmental Training and the operators association's short courses round out the options, and the cybersecurity training now sits alongside the technical hours on every renewal.

Reciprocity

Maryland can certify an out-of-state operator without an exam if they meet the state's education and experience requirements, hold either a national-body certificate or one from a state with substantially equivalent exams, and are employed or awaiting employment in Maryland. The fee is $150 plus the certification fee. One limit: the superintendent designation is never granted by reciprocity; reciprocal operators meet Maryland's superintendent requirements separately.

Where to get help (small systems)

• Maryland Rural Water Association, md-rwa.org: credit-hour training, circuit riders, and a two-year apprenticeship that culminates in certification.
• The board's home page carries the classifications, exam schedule, approved-training lists, and the cybersecurity notice.
• The operators association short courses are the paper-exam path and a steady source of training units.
• The Maryland Center for Environmental Training runs exam prep and scheduled classes.

Running a system in Maryland

The oversight and funding picture for managers and boards.

Rate regulation. The Public Service Commission regulates the rates and service of roughly two dozen investor-owned water and sewer systems. The large majority of Maryland systems are municipal and set rates locally, outside commission jurisdiction.

Funding. The Department of the Environment's Water Quality Financing Administration runs both revolving funds, the drinking water loan fund and the clean water fund, from one office.

Mutual aid. Maryland participates in the national WARN framework for utilities helping utilities after a disaster. Sign the agreement before the nor'easter.