100+ Free PA Water/Wastewater Operator Practice Questions
Pass your Pennsylvania Water and Wastewater Operator Certification exam on the first try — instant access, no signup required.
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About the PA Water/Wastewater Operator Exam
The Pennsylvania water and wastewater operator certification exam covers Act 11, 25 Pa. Code Chapter 302, Classes A-E with technology subclasses, Chesapeake Bay nutrient management, treatment processes, distribution/collection systems, laboratory procedures, and safety.
Questions
100 scored questions
Time Limit
2-3 hours
Passing Score
70%
Exam Fee
$35 per exam session (Pennsylvania Department of Environmental Protection (DEP))
PA Water/Wastewater Operator Exam Content Outline
State Laws & Regulations
Act 11, 25 Pa. Code Chapter 302, certification classes A-E, subclasses, and Chesapeake Bay TMDL
Water Treatment
Coagulation, filtration, softening, disinfection, corrosion control, and DBP management
Wastewater Treatment
Activated sludge, nutrient removal (N and P), sludge handling, and biosolids management
Distribution & Collection
Pumps, CSO management, backflow prevention, hydraulics, and system operations
Laboratory & Safety
Sampling, analytical methods, record-keeping, OSHA compliance, and chemical safety
How to Pass the PA Water/Wastewater Operator Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 2-3 hours
- Exam fee: $35 per exam session
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
Frequently Asked Questions
What is the two-part exam structure in Pennsylvania?
For Classes A-D, operators must pass both a Part 1 General Exam (common knowledge) and a Part 2 subclass exam (technology-specific, such as filtration or activated sludge). Classes E, Dc, and Dn have standalone exams.
What is the Class Dc certification?
Class Dc is for operators of small groundwater systems serving <500 people that use only disinfection treatment. It requires a standalone exam without the Part 1 General Exam.
How much does the Pennsylvania exam cost?
DEP charges $35 per exam session, but operators don't need to pay until they apply for certification or reach their fifth exam session.