Requirements by state
North Dakota water operator certification
Quick answer
How do I get certified as a water operator in North Dakota?
North Dakota certifies water treatment, water distribution, wastewater treatment, and wastewater collection operators on one identical five-class scale, Class IA through Class IV, under Article 33.1-19-01 of the Administrative Code. Certification costs $150 per exam and $40 a year to renew, with 12 continuing-education credits due every three years. Certificates issued by reciprocity, without examination, are available to operators from any state, territory, or country whose own certification requirements are equal to or stricter than North Dakota's.
See how North Dakota compares to every other jurisdiction in the national comparison matrix, or check reciprocity between states if you are moving.
Certifying agency: North Dakota Department of Environmental Quality (NDDEQ), Division of Municipal Facilities, Operator Certification & Training Unit
- Submit a certification application to the department at least 15 days before the exam; the application stays valid for 6 months
- Meet the education and experience minimum in Table 33.1-19-01-12 for the class (IA, I, II, III, or IV) sought
- Pass the written, oral, or electronic examination for that classification; a failed exam may be retaken once within a year
- Renew every January 1 for $40, and earn 12 continuing-education credits every three years to keep the certificate active
Water treatment
- IA: Class IA , Facilities using simple chemical or physical treatment, serving fewer than 500 people.
- I: Class I , Chemical treatment (disinfection, fluoridation, corrosion control, or similar) serving 500 to 5,000 people, with a minor degree of operational control.
- II: Class II , Chemical treatment serving 5,000 to 15,000, or more complex processes like chemical softening, coagulation/sedimentation, or iron/manganese oxidation at smaller population thresholds, requiring a moderate degree of operational control.
- III: Class III , Chemical treatment serving 15,000 or more, or the more complex processes above at mid-range populations, requiring a high degree of operational control.
- IV: Class IV , The most complex facilities: chemical softening, coagulation/sedimentation, or iron/manganese oxidation plants serving the largest populations (5,000 to 15,000 or more depending on process), requiring a high degree of operational control.
- Exam
- Written, oral, or electronic exam at the department's discretion, prepared separately for each classification. Held at least once a year, with additional sessions at the department's discretion. Graded by department personnel or a designated third-party examination service.
- Education minimum
- Completion of high school or an equivalency certificate, or a combination of education and experience the department finds satisfactory. One year of acceptable operating experience may substitute for one year of high school; a high school equivalency certificate may substitute for graduation.
- Experience minimum
- Class IA: 6 months operating a Class IA or higher facility. Class I: 1 year at Class I or higher. Class II: 1 to 3 years at Class I or higher depending on education (a four-year degree needs 1 year with 1 in direct responsible charge; a high school diploma needs 3 years with 1 in direct responsible charge). Class III: 2 to 4 years at Class II or higher with 2 years in direct responsible charge. Class IV: 3 to 5 years at Class III or higher with 2 years in direct responsible charge. Experience cannot substitute for the education requirement and vice versa.
- Exam fee
- $150 per examination, nonrefundable once received, unless the application itself is rejected
- Continuing education
- 12 continuing-education credits required within each 3-year period, earned through department-recognized training programs, seminars, workshops, or schools. Operators who leave North Dakota are exempt from the credit requirement while they remain out of state, provided they keep paying the annual renewal fee, but must earn the credits during their first year back if they resume operating in the state.
- Renewal cycle
- 1 year
- Reciprocity
- The department may issue certificates by reciprocity, without examination, to any person holding a certificate from another state, US territory or possession, or a country, if that jurisdiction's certification requirements are equal to or higher than North Dakota's own requirements for a like certificate, and reciprocal privileges are granted to North Dakota-certified operators in return.
North Dakota is the one state in this batch that runs water treatment, water distribution, wastewater treatment, and wastewater collection on the exact same Class IA-I-II-III-IV scale under one unified administrative chapter, rather than a different scale per discipline. Certificates expire every January 1 and must be renewed annually even though the continuing-education obligation is on a 3-year clock, similar in structure to New Jersey's two-clock system.
Water distribution
- IA: Class IA , Systems serving fewer than 500 people.
- I: Class I , Systems serving 500 to 1,500 people.
- II: Class II , Systems serving 1,500 to 15,000 people.
- III: Class III , Systems serving 15,000 to 50,000 people.
- IV: Class IV , Systems serving 50,000 people or more.
- Exam
- Same exam structure as water treatment: written, oral, or electronic at department discretion, a separate exam prepared for the distribution classification.
- Education minimum
- Same statewide floor as every discipline: high school or equivalency certificate, or a satisfactory combination of education and experience.
- Experience minimum
- Same Table 33.1-19-01-12 ladder that applies to every discipline: Class IA needs 6 months, Class I needs 1 year, Class II needs 1 to 3 years depending on education (with 1 year in direct responsible charge), Class III needs 2 to 4 years (2 years in direct responsible charge), Class IV needs 3 to 5 years (2 years in direct responsible charge).
- Exam fee
- $150 per examination, the same statewide fee as every discipline.
- Continuing education
- 12 continuing-education credits per 3-year period, the same statewide requirement as every discipline.
- Renewal cycle
- 1 year
- Reciprocity
- Same equal-or-higher reciprocity standard as water treatment, evaluated by the department.
Classification is population-driven and purely by system size for distribution, unlike water treatment's mix of population thresholds and treatment-process complexity.
Wastewater treatment
- IA: Class IA , Stabilization ponds, land treatment, wetlands, or other nonmechanical facilities requiring a minor degree of operational control, serving a population equivalent under 500.
- I: Class I , The same nonmechanical facility types requiring minor operational control, serving a population equivalent of 500 to under 10,000.
- II: Class II , Mechanical facilities (mechanically aerated ponds, oxidation ditches) requiring moderate operational control under 10,000 population equivalent, or nonmechanical facilities at 10,000 or more.
- III: Class III , Mechanical facilities requiring moderate operational and laboratory control at 10,000 or more population equivalent, or activated sludge/trickling filter/rotating biological contactor facilities requiring a high degree of control under 10,000.
- IV: Class IV , Activated sludge, trickling filter, rotating biological contactor, or separate sludge stabilization facilities requiring a high degree of operational and laboratory control, serving 10,000 population equivalent or more.
- Exam
- Same exam structure as water treatment: written, oral, or electronic at department discretion, a separate exam prepared for the wastewater treatment classification.
- Education minimum
- Same statewide floor: high school or equivalency certificate, or a satisfactory combination of education and experience.
- Experience minimum
- Same Table 33.1-19-01-12 ladder shared across all four disciplines: Class IA needs 6 months, Class I needs 1 year, Class II needs 1 to 3 years, Class III needs 2 to 4 years, Class IV needs 3 to 5 years, with education able to substitute for part of the experience but never eliminate the direct-responsible-charge component at Class II and above.
- Exam fee
- $150 per examination, the same statewide fee as water treatment and distribution.
- Continuing education
- 12 continuing-education credits per 3-year period, the same statewide requirement as every discipline.
- Renewal cycle
- 1 year
- Reciprocity
- Same equal-or-higher reciprocity standard as water treatment, evaluated by the department, without examination when granted.
Wastewater treatment classification is driven by treatment technology as much as size: a small mechanical plant (Class II or III) can outrank a much larger pond or land-treatment system (Class I) because mechanical processes demand more operational control, the same design logic North Dakota applies to water treatment's chemical-process classes.
Wastewater collection
- IA: Class IA , Systems serving fewer than 500 people.
- I: Class I , Systems serving 500 to 1,500 people.
- II: Class II , Systems serving 1,500 to 15,000 people.
- III: Class III , Systems serving 15,000 to 50,000 people.
- IV: Class IV , Systems serving 50,000 people or more.
- Exam
- Same exam structure as the other three disciplines: written, oral, or electronic at department discretion, a separate exam for the collection and transfer classification.
- Experience minimum
- Same Table 33.1-19-01-12 ladder shared across all four disciplines: Class IA needs 6 months, Class I needs 1 year, Class II needs 1 to 3 years, Class III needs 2 to 4 years, Class IV needs 3 to 5 years.
- Exam fee
- $150 per examination, the same statewide fee as every discipline.
- Continuing education
- 12 continuing-education credits per 3-year period, the same statewide requirement as every discipline.
- Renewal cycle
- 1 year
- Reciprocity
- Same equal-or-higher reciprocity standard applied by the department as the other three disciplines.
Wastewater collection uses the identical population-based Class IA-I-II-III-IV thresholds as water distribution, the clearest example of North Dakota's one-scale-fits-all design across all four disciplines.
North Dakota is the simplest state in this batch to learn once: water treatment, water distribution, wastewater treatment, and wastewater collection are all certified on the exact same five-class scale, under one administrative chapter, with one fee schedule and one renewal calendar. Nothing here has a separately numbered ladder per discipline the way New Jersey (which shares a scale but different letters) or North Carolina (which runs five distinct wastewater types) do.
One chapter, four disciplines, five classes
North Dakota Administrative Code Article 33.1-19-01, amended effective April 1, 2026, classifies every water treatment facility, water distribution and storage system, wastewater treatment facility, and wastewater collection and transfer system into one of five classes: Class IA, I, II, III, and IV. Classification is driven by population served, design population, treatment or system complexity, and (for treatment facilities) the sophistication of the process itself, not size alone. A small mechanical wastewater plant can outrank a much larger stabilization pond because mechanical processes need more operational control.
For water distribution and wastewater collection, the thresholds are cleanly population-based:
| Class | Population served |
|---|---|
| IA | Under 500 |
| I | 500 to 1,500 |
| II | 1,500 to 15,000 |
| III | 15,000 to 50,000 |
| IV | 50,000 or more |
Water treatment and wastewater treatment layer process complexity on top of population, so the same population range can land in a different class depending on whether the facility uses simple chemical addition, chemical softening, coagulation/sedimentation, or (for wastewater) mechanical aeration versus a pond or land-treatment system.
Education, experience, and direct responsible charge
Every class shares one qualifying table (33.1-19-01-12): a high school diploma or equivalency certificate, plus documented operating experience that climbs from 6 months at Class IA to 3 to 5 years at Class IV, with Class II and above requiring part of that experience to be in direct responsible charge, meaning full, active on-site operating responsibility, not just time on staff. A four-year college degree shortens the experience requirement at every level above Class I; one year of operating experience can substitute for one year of high school, but experience can never substitute for both the education and the experience requirement at once.
Exam, fees, and the two-clock renewal
The exam fee is $150 regardless of discipline or class, and the annual renewal fee is $40 per certificate. Certificates expire every January 1 and must be renewed annually, but the continuing-education obligation runs on a separate 3-year clock: 12 credits due once every three years, not every year, the same two-clock structure New Jersey uses for its own annual-fee-but-triennial-training system. An operator who leaves North Dakota can keep a certificate alive by paying the annual fee alone, without earning credits, until they resume working in the state, at which point the credit requirement restarts.
Reciprocity: automatic if the other state is equal or stricter
North Dakota’s reciprocity rule is unusually direct: the department may issue certificates by reciprocity, without examination, to any operator holding a certificate from another US state, territory, or a foreign country, as long as that jurisdiction’s own certification requirements are equal to or higher than North Dakota’s for the equivalent certificate, and North Dakota-certified operators receive the same reciprocal treatment in return. There is no separate reciprocity fee schedule published in the rule beyond the standard application process.
Sources: North Dakota Legislative Branch, North Dakota Administrative Code Article 33.1-19-01, Certification of Water Treatment Facility Operators, Water Distribution and Storage System Operators, Wastewater Treatment Facility Operators, and Wastewater Collection and Transfer System Operators (ndlegis.gov, history: effective January 1, 2019, amended effective April 1, 2026, retrieved 2026-07-29); NDDEQ Division of Municipal Facilities, Operator Certification & Training Unit program page (deq.nd.gov, retrieved 2026-07-29). Authored by the Water Cert Prep editorial team. Not legal advice. Reviewed 2026-07-29.