200+ Free PE Environmental Practice Questions
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Key Facts: PE Environmental Exam
80
Exam Questions
NCEES
8 hrs
Test Time
NCEES
61%
Pass Rate
NCEES
$400
Exam Fee
NCEES
6
Content Areas
NCEES 2026
9 hrs
Total Appointment
NCEES
The PE Environmental exam has a 61% pass rate for first-time takers and 50% for repeat takers. The 80-question computer-based exam allows 9 hours total (including tutorial and break). The 2026 exam specifications include six content areas with the new Sustainability topic (7-11 questions). The exam covers water treatment, air quality, waste management, site remediation, and environmental health. Strong preparation in mass balances, reactor kinetics, and environmental regulations is essential.
About the PE Environmental Exam
The NCEES PE Environmental exam is an 80-question computer-based test designed for engineers with a minimum of four years of post-college work experience in environmental engineering. The 2026 exam specifications cover six content areas: Water (19-29 questions), Solid & Hazardous Waste (11-17), Sustainability (7-11), Air Quality (13-20), Site Assessment & Remediation (13-20), and Environmental & Occupational Health (7-11). The exam tests engineering principles applicable to pollution control, waste management, public health protection, and environmental remediation. Topics include water and wastewater treatment, air pollution control, solid waste management, site remediation, risk assessment, and environmental regulations.
Questions
80 scored questions
Time Limit
8 hours
Passing Score
Approximately 70% (scaled)
Exam Fee
$400 (NCEES (Pearson VUE))
PE Environmental Exam Content Outline
Water
Water quality, water supply, wastewater treatment, hydrology, groundwater, stormwater, disinfection, biological treatment, sludge processing, water regulations
Solid & Hazardous Waste
Waste characterization, collection, treatment, disposal, landfills, leachate, LFG management, RCRA, waste minimization, recycling, composting
Sustainability
Life cycle assessment, carbon footprint, renewable energy, green design, sustainability metrics, climate adaptation, circular economy, ESG
Air Quality
Air pollutants, emissions estimation, pollution control, particulate and gaseous control, CAA, NSPS, NAAQS, dispersion modeling, indoor air
Site Assessment & Remediation
Site characterization, risk assessment, contaminant transport, remediation technologies, bioremediation, CERCLA, Phase I/II ESAs
Environmental & Occupational Health
Toxicology, exposure pathways, dose-response, industrial hygiene, PPE, OSHA, health standards, risk characterization
How to Pass the PE Environmental Exam
What You Need to Know
- Passing score: Approximately 70% (scaled)
- Exam length: 80 questions
- Time limit: 8 hours
- Exam fee: $400
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
PE Environmental Study Tips from Top Performers
Frequently Asked Questions
What is the PE Environmental exam pass rate?
The first-time pass rate is approximately 61%, while the repeat pass rate is about 50% (NCEES data). These rates are comparable to other PE exams. The pass rate reflects the exam's comprehensive coverage of environmental engineering topics. Candidates with strong experience in water/wastewater treatment, air quality, and remediation tend to perform better.
What changed in the 2026 PE Environmental exam specifications?
The 2026 exam specifications include a new Sustainability topic (7-11 questions) covering life cycle assessment, carbon footprint, renewable energy, green design, and ESG. The Water topic weighting was slightly reduced (from 21-35 to 19-29 questions) and Air was reduced (from 14-22 to 13-20). Project Management topics are now integrated into each domain rather than as a standalone section.
How hard is the PE Environmental exam?
The PE Environmental exam is considered moderately challenging with a 61% first-time pass rate. The exam covers a broad range of topics across six content areas. Most successful candidates study 200-300 hours over 3-6 months. Strong preparation in water/wastewater treatment fundamentals, mass balances, reactor kinetics, air pollution control, and environmental regulations is essential. Many candidates take review courses focused on environmental engineering.
What are the PE Environmental exam requirements?
To take the PE Environmental exam, you need: (1) a bachelor's degree from an ABET-accredited engineering program, (2) passing the FE exam, (3) typically 4 years of progressive environmental engineering experience (varies by state), and (4) state board approval. Some states have additional requirements. The experience should be under a licensed PE and demonstrate increasing responsibility in environmental engineering work.
What references are provided during the exam?
NCEES provides the PE Environmental Reference Handbook as a searchable PDF during the exam. You cannot bring personal reference materials. The handbook includes formulas, tables, and reference data. It's critical to familiarize yourself with the electronic handbook format before exam day. The NCEES website offers a free PDF version for study purposes.
Which topics are most heavily tested on the PE Environmental exam?
The most heavily weighted topics are Water (19-29 questions) and Site Assessment & Remediation (13-20 questions) and Air Quality (13-20 questions). Within Water, expect questions on water/wastewater treatment processes, disinfection, and sludge management. For Site Assessment, focus on risk assessment, contaminant transport, and remediation technologies. For Air Quality, study emission estimation, control technologies, and dispersion modeling.