100+ Free ND Water/Wastewater Operator Practice Questions
Pass your North Dakota Water and Wastewater Operator Certification exam on the first try — instant access, no signup required.
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Key Facts: ND Water/Wastewater Operator Exam
I-V
Facility Classification Levels
NDDEQ
July 1
Annual Expiration Date
NDAC 33-19
12 CECs
Credits per Training Session
NDDEQ
15 days
Application Deadline Before Exam
NDAC 33-19
5
Facility Classes (Water + WW)
NDDEQ
About the ND Water/Wastewater Operator Exam
North Dakota classifies water and wastewater facilities in five classes (I-V) with separate exams for each. Certificates are valid for one year and expire July 1. This practice exam covers NDDEQ regulations under NDAC 33-19, treatment processes, distribution/collection, and laboratory procedures.
Questions
100 scored questions
Time Limit
3 hours
Passing Score
70%
Exam Fee
Varies by classification (ND Department of Environmental Quality (NDDEQ))
ND Water/Wastewater Operator Exam Content Outline
ND State Laws and Regulations
NDAC 33-19 certification requirements, facility classification Classes I-V, annual renewal (July 1), CEC requirements, and ND-specific discharge rules
Water Treatment
Groundwater and surface water treatment, lime softening, iron/manganese removal, disinfection, fluoridation, and cold-climate operations
Wastewater Treatment
Lagoon systems, activated sludge, nutrient removal, sludge handling, cold-climate challenges, and small community treatment
Distribution and Collection Systems
Cold-weather protection, frost-line considerations, pump operations, hydrants, main disinfection, and system pressure management
Laboratory Testing and Safety
Water quality testing, sample collection and preservation, operator math, safety procedures, and confined space entry
How to Pass the ND Water/Wastewater Operator Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 3 hours
- Exam fee: Varies by classification
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
ND Water/Wastewater Operator Study Tips from Top Performers
Frequently Asked Questions
How does ND classify water and wastewater facilities?
North Dakota classifies water and wastewater treatment facilities in one of five classes (I through V) based on population served, design capacity, treatment complexity, and the nature of receiving waters. Operators must be certified at the class level matching their facility.
How often must ND operator certificates be renewed?
ND operator certificates are valid for a maximum of one year and expire on July 1. Renewal requires meeting continuing education credit (CEC) requirements. Operators earn 12 CECs per approved training session attended.
What regulation governs ND operator certification?
ND operator certification is governed by NDAC 33-19 (North Dakota Administrative Code, Article 33-19) and Chapter 23.1-07 of the ND Century Code, covering Water Distribution and Wastewater Systems Operators.
Who provides operator training in ND?
The NDDEQ Operator Certification and Training staff provide certification and classroom training. The ND Rural Water Systems Association also provides exam preparation and training. Training sessions earn 12 CECs per session.