operator guide

Connecticut Water & Wastewater Operator Certification

Drinking water: WTP Classes I-IV, Distribution Classes I-III, Small Water System, and WTP/DS operator-in-training. Wastewater: Classes I-IV with OIT for I-III.

RegulatorDrinking water: Connecticut Department of Public Health, Drinking Water Section. Wastewater: Department of Energy and Environmental Protection, Bureau of Water Protection and Land Reuse.
CoverageDrinking water: WTP Classes I-IV, Distribution Classes I-III, Small Water System, and WTP/DS operator-in-training. Wastewater: Classes I-IV with OIT for I-III.

Who regulates water operators in Connecticut?

Drinking water: Connecticut Department of Public Health, Drinking Water Section. Wastewater: Department of Energy and Environmental Protection, Bureau of Water Protection and Land Reuse. administers the credentials covered here.

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Certification types

  • Drinking water: WTP Classes I-IV, Distribution Classes I-III, Small Water System, and WTP/DS operator-in-training. Wastewater: Classes I-IV with OIT for I-III.

Certification levels / grades / classes

Drinking water: WTP Classes I-IV, Distribution Classes I-III, Small Water System, and WTP/DS operator-in-training. Wastewater: Classes I-IV with OIT for I-III.

Initial certification requirements

DPH approves application, then PSI schedules WPI standardized computer exam; wastewater exams are offered in regulator-designated windows and reciprocity uses the same application family.

Exam information

DPH approves application, then PSI schedules WPI standardized computer exam; wastewater exams are offered in regulator-designated windows and reciprocity uses the same application family.

Renewal cycle

Drinking-water certificates renew on a three-year cycle. Wastewater certificates do not have a separate periodic expiration stated in RCSA 22a-416; they become inactive two years after the operator leaves wastewater employment and may be reissued after satisfying current requirements.

Continuing-education requirements

Drinking water: Class I/SWS 10 TCH, Class II 20, Classes III-IV 30 within the three-year cycle. Wastewater CEUs are used for initial/class advancement and DEEP maintains separate continuing-education guidance; the rule does not impose a periodic numeric renewal total comparable to DPH drinking-water renewal.

Reciprocity / out-of-state operators

Both programs provide reciprocity processes; wastewater requests are processed as submitted.

Water vs. wastewater differences

Drinking water: WTP Classes I-IV, Distribution Classes I-III, Small Water System, and WTP/DS operator-in-training. Wastewater: Classes I-IV with OIT for I-III.

Official forms and sources

Last verified: August 25, 2026. Confirm current details with the applicable authority.