Requirements by state
Connecticut water operator certification
Quick answer
How do I get certified as a water operator in Connecticut?
Connecticut splits certification across two agencies: the Department of Public Health certifies drinking water treatment (Classes 1 to 4) and distribution (Classes 1 to 3, plus Small Water System Operator) operators, while the Department of Energy and Environmental Protection certifies wastewater operators. Higher drinking-water classes use the ABC standardized exam; the exam fee to PSI is $106.
See how Connecticut compares to every other jurisdiction in the national comparison matrix, or check reciprocity between states if you are moving.
Certifying agency: Connecticut Department of Public Health, Drinking Water Section (drinking water); Connecticut Department of Energy and Environmental Protection (wastewater)
- Meet the education and documented operating-experience minimum for the class you are applying for.
- Submit an operator certification exam application to the certifying agency for your discipline (DPH for drinking water, DEEP for wastewater).
- Pay the exam fee to PSI and sit the exam; Classes 3, 4, and D use the ABC standardized exam.
- Renew on the state's cycle by completing the required continuing-education contact hours.
Water treatment
- T1 , Entry-level treatment certificate
- T2
- T3 , ABC standardized exam required
- T4 , Highest treatment classification, ABC standardized exam required
- Exam
- State-administered exam through Classes 1 and 2; ABC standardized exam required for Classes 3 and 4, delivered by PSI
- Exam fee
- $106, paid to PSI at the time the exam is scheduled
- Continuing education
- Continuing-education contact hours required to renew, tracked by the DPH Drinking Water Section
- Reciprocity
- Connecticut evaluates out-of-state certificates individually through the DPH Drinking Water Section rather than granting automatic reciprocity.
Certified by the Department of Public Health, not DEEP; drinking water and wastewater sit under two different Connecticut agencies.
Water distribution
- SWSO , Small Water System Operator, a simplified track for the smallest distribution systems
- D1 , Entry-level distribution certificate
- D2
- D3 , Highest distribution classification
- Exam
- State-administered exam, delivered by PSI
- Exam fee
- $106, paid to PSI at the time the exam is scheduled
- Continuing education
- Continuing-education contact hours required to renew, tracked by the DPH Drinking Water Section
- Reciprocity
- Connecticut evaluates out-of-state certificates individually through the DPH Drinking Water Section rather than granting automatic reciprocity.
Distribution runs a 3-tier D1 to D3 scale plus the separate small-system operator (SWSO) track for the smallest community systems, a lighter path most states without an SWSO tier do not offer.
Wastewater treatment
- Class I , Entry-level wastewater treatment certificate
- Class II
- Class III
- Class IV , Highest wastewater treatment classification
- Exam
- Certified by the Department of Energy and Environmental Protection (DEEP), not DPH. Exams are given once per year.
- Application / certification fee
- $240 non-refundable exam application fee, due whether or not the applicant is ultimately found eligible
- Exam fee
- $114, paid separately to the testing agency
- Continuing education
- Continuing-education units (CEUs) required to maintain certification; DEEP treats 45 CEUs as equivalent to one year of post-high-school education for experience-substitution purposes, though CEUs cannot substitute for direct responsible-charge time.
- Reciprocity
- DEEP grants reciprocal certification by application, but an operator who accepts a reciprocal certificate must remain in the same position for at least one year or the reciprocal certificate becomes null and void.
Wastewater sits with DEEP, not DPH, and charges a separate $240 application fee plus a $114 exam fee, well above the drinking-water side's single $106 PSI fee.
Wastewater collection
- Collection I
- Collection II , Highest collection classification
- Exam
- Certified by the Department of Energy and Environmental Protection (DEEP), not DPH
- Reciprocity
- DEEP grants reciprocal certification by application, but an operator who accepts a reciprocal certificate must remain in the same position for at least one year or the reciprocal certificate becomes null and void.
Fee schedule specific to the collection track was not separately confirmed and is left out rather than assumed identical to the treatment track.
Connecticut is one of the states in this batch that splits certification across two separate agencies rather than running it from one office. The Department of Public Health (DPH) Drinking Water Section certifies water treatment and distribution operators. Wastewater operators are certified separately by the Department of Energy and Environmental Protection (DEEP). An operator moving between the drinking-water and wastewater sides of the industry in Connecticut is really moving between two different certifying bodies, not just two exam tracks inside one office.
Drinking water: two disciplines, a small-system track, and the ABC exam at the top
Treatment operators are classed T1 through T4, with T3 and T4 requiring the ABC standardized exam rather than a Connecticut-only exam; T1 and T2 use a state-administered exam. Distribution operators run D1 through D3, and Connecticut adds a Small Water System Operator (SWSO) certificate, a lighter track built specifically for the smallest community water systems rather than forcing every operator through the same D1 minimum. Both tracks pay a $106 exam fee to PSI at the time the exam is scheduled.
Wastewater sits with DEEP, and costs more to test for
Connecticut’s wastewater treatment operators are classed Class I through Class IV, and collection system operators hold a separate Collection I or Collection II certificate. Both are certified through DEEP, which gives the exam once a year and charges a $240 non-refundable application fee plus a separate $114 exam fee to the testing agency, well above the drinking-water side’s single $106 PSI fee. DEEP counts 45 CEUs as roughly equivalent to a year of post-high-school education when evaluating an applicant’s background, though continuing-education credit cannot substitute for documented direct responsible-charge time on the job.
Reciprocity
DPH evaluates out-of-state drinking-water certificates individually rather than granting automatic reciprocity. DEEP does grant reciprocal wastewater certification by application, but with a real condition attached: an operator who accepts a reciprocal certificate must stay in the same position for at least one year, or the reciprocal certificate becomes null and void.