100+ Free MS Water Operator Practice Questions
Pass your Mississippi Water/Wastewater Operator Certification exam on the first try — instant access, no signup required.
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Key Facts: MS Water Operator Exam
70%
Passing Score
Mississippi DEQ (wastewater) / Mississippi State Department of Health (water supply)
100
Practice Questions
OpenExamPrep
2.5 hours
Exam Time Limit
Mississippi DEQ (wastewater) / Mississippi State Department of Health (water supply)
$50-$100
Exam Fee
Mississippi DEQ (wastewater) / Mississippi State Department of Health (water supply)
About the MS Water Operator Exam
Mississippi water supply operator certification is administered by MSDH (Classes A-D) and wastewater operator certification by MDEQ (Classes I-IV). Wastewater exams are offered three times per year preceded by 3-4 day prep courses. Operators must pass Class II before sitting for Class III or IV. Exam grades are held on file for three years while completing education and experience requirements.
Questions
100 scored questions
Time Limit
2.5 hours
Passing Score
70%
Exam Fee
$50-$100 (Mississippi DEQ (wastewater) / Mississippi State Department of Health (water supply))
MS Water Operator Exam Content Outline
State Laws & Regulations
Mississippi certification classifications, licensing requirements, renewal, continuing education, and regulatory compliance
Water Treatment
Coagulation, flocculation, sedimentation, filtration, disinfection, chemical feed, corrosion control, and treatment math
Wastewater Treatment
Activated sludge, trickling filters, nutrient removal, sludge handling, digestion, dewatering, and process troubleshooting
Distribution & Collection
Pumps, hydraulics, water main maintenance, backflow prevention, sewer system operation, and I/I management
Laboratory Testing
Sampling, preservation, BOD/TSS analysis, chlorine residual, turbidity, pH, dissolved oxygen, QA/QC, and records
How to Pass the MS Water Operator Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 2.5 hours
- Exam fee: $50-$100
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
MS Water Operator Study Tips from Top Performers
Frequently Asked Questions
Who administers water operator certification in Mississippi?
Water and/or wastewater operator certification in Mississippi is administered by Mississippi DEQ (wastewater) / Mississippi State Department of Health (water supply). Wastewater: Class I-IV; Water supply: Class A-D. Must pass Class II before sitting for Class III/IV..
What score do I need to pass the Mississippi water operator exam?
Mississippi requires a passing score of 70% on the operator certification exam. The exam typically consists of 100 multiple-choice questions with a time limit of 2.5 hours.
How often must I renew my Mississippi water operator certification?
Annual renewal with continuing education requirements. Continuing education requirements vary by certification level and must be completed through state-approved providers.
What topics are covered on the Mississippi water operator exam?
The exam covers state-specific regulations and licensing requirements, water treatment processes, wastewater treatment operations, distribution and collection system maintenance, laboratory testing and analysis, safety procedures, and operator math calculations.