Requirements by state
Delaware water operator certification
Quick answer
How do I get certified as a water operator in Delaware?
Delaware certifies drinking water operators through the Division of Public Health (classes VSWS through IV) and wastewater operators through DNREC's Board of Certification for Wastewater Operators (Temporary through Level IV). Both licenses run on a 2-year renewal cycle with 20 continuing-education units required each cycle, and both accept reciprocity applications from operators certified in other states.
See how Delaware compares to every other jurisdiction in the national comparison matrix, or check reciprocity between states if you are moving.
- Meet the education and documented operating-experience minimum for the license class you are applying for.
- Register and pay the required fee to sit the operator exam with the certifying agency for your discipline.
- Pass the exam (75% or higher for wastewater) and receive your license.
- Renew every 2 years by paying the renewal fee and completing the required continuing-education units.
Water treatment
- VSWS , Very Small Water System, the entry tier below Class I
- I , Entry-level licensed class
- II
- III
- IV , Highest treatment classification
- Exam
- State-administered exam through Delaware's Division of Public Health
- Exam fee
- Renewal fee is $100 per 2-year license period; initial exam and application fees are set separately by DPH
- Continuing education
- 20 continuing-education units (CEUs) required every 2 years to renew
- Renewal cycle
- 2 years
- Reciprocity
- Delaware DPH accepts reciprocity applications from operators licensed in other states.
Certified by the Division of Public Health, separate from DNREC, which certifies wastewater operators.
Water distribution
- VSWS , Very Small Water System, the entry tier below Class I
- I , Entry-level licensed class
- II
- III
- IV , Highest distribution classification
- Exam
- State-administered exam through Delaware's Division of Public Health
- Continuing education
- 20 continuing-education units (CEUs) required every 2 years to renew
- Renewal cycle
- 2 years
- Reciprocity
- Delaware DPH accepts reciprocity applications from operators licensed in other states.
Delaware licenses treatment and distribution operators together under the same DPH class scale rather than running two separate numbering systems.
Wastewater treatment
- Temporary , Short-term license issued while an operator works toward full certification
- I , Requires a high school diploma and one year of acceptable operating experience
- II , Requires a high school diploma and additional documented operating experience beyond Level I
- III
- IV , Highest wastewater classification
- Exam
- State-administered exam through DNREC's Board of Certification for Wastewater Operators, offered four times a year (February, May, August, November)
- Experience minimum
- Level I requires a high school diploma and one year of acceptable operating experience; Level II requires a high school diploma and additional documented operating experience beyond Level I.
- Application / certification fee
- $50 non-refundable application fee through Digital DNREC
- Exam fee
- $100 non-refundable exam fee, due at time of registration
- Continuing education
- 20 hours of approved training required each 2-year renewal period
- Renewal cycle
- 2 years
- Reciprocity
- Yes. DNREC's Board of Certification for Wastewater Operators accepts reciprocity applications from operators certified in other states, via a dedicated reciprocity request form.
A candidate must pass with a score of 75% or higher.
Wastewater collection
- Temporary
- I
- II
- III
- IV , Highest wastewater classification
- Exam
- Delaware licenses wastewater collection under the same DNREC Board of Certification for Wastewater Operators program used for wastewater treatment, rather than a separate collection-only license track.
- Renewal cycle
- 2 years
- Reciprocity
- Yes, through the same DNREC reciprocity request process used for wastewater treatment operators.
Delaware's wastewater program does not separate collection-system operators into their own numbered track the way several larger states do; collection duties are covered inside the same I to IV wastewater operator license.
Delaware splits certification the same way Connecticut does: drinking water sits with the Division of Public Health (DPH), wastewater sits with the Department of Natural Resources and Environmental Control (DNREC). The two programs share one design choice worth calling out: both run a 2-year renewal cycle, unlike the 3-year cycle several other states in this batch use, and both land on 20 units of continuing education per cycle.
Drinking water: VSWS through Class IV, DPH
Delaware’s drinking water side covers treatment and distribution operators under one Class scale, Very Small Water System (VSWS) through Class IV, rather than splitting treatment and distribution into two different numbering systems the way Colorado does. Renewal is $100 every 2 years, with 20 CEUs required each cycle.
Wastewater: DNREC, a Temporary license, and Levels I through IV
DNREC’s Board of Certification for Wastewater Operators licenses wastewater operators from Temporary through Level IV, and covers collection-system duties inside the same license rather than issuing a separate collection-only certificate. Level I requires a high school diploma plus one year of acceptable operating experience; Level II adds further documented experience beyond that. The exam is offered four times a year, in February, May, August, and November, and requires a passing score of 75% or higher. Registration runs through Digital DNREC: a $50 non-refundable application fee, plus a separate $100 non-refundable exam fee due at the time of registration.
Reciprocity
Both agencies accept reciprocity applications from operators already certified in another state. DNREC runs its wastewater reciprocity process through a dedicated request form rather than folding it into the standard exam application.