Practise Board Certified Environmental Scientist (BCES) with a short sample and answer explanations. These are independent learning materials, not official exam questions or a pass prediction.
Exam outline and official sources
American Academy of Environmental Engineers and Scientists (AAEES), through the American Academy of Environmental Scientists Certification Board (AAESCB) · Current, undated AAEES BCES specialty scope descriptions checked on 2026-10-19. BCES is a specialty certification with specialty-specific examinations, rather than one general environmental science examination. No effective date or percentage weights are published for the ten environmental science specialties on the consulted scope page.
This original 20-question sample covers selected topics across the outline. It does not reproduce official exam questions or cover every tested topic.
- Become a Board Certified Environmental Scientist
- Specialty Descriptions
- Specialty Examination Guide
- How to Prepare for the Examinations for Environmental Engineering and Environmental Science Specialty Certifications, 2nd edition — public excerpt
- Ground-level Ozone Basics
- Improving Indoor Air Quality
- Dissolved Oxygen
- Indicators: Benthic Macroinvertebrates
- pH and Water
- Understanding Variation in Partition Coefficient, Kd, Values: Volume I
- Quality Control Guidelines for SAM Chemical Methods
- Nutrient Control Design Manual, EPA/600/R-10/100, August 2010
- Conducting a Human Health Risk Assessment
- Risk Assessment Guidance for Superfund, Volume I: Human Health Evaluation Manual, Part A
- Ground-Water Monitoring and Corrective Action
- Vertical Flowmeter Logging
- Engineering Issue: Soil Vapor Extraction Technology, February 2018
- A Citizen's Guide to Monitored Natural Attenuation
- How Superfund Addresses Groundwater Contamination
- Sustainable Materials Management: Non-Hazardous Materials and Waste Management Hierarchy
- Composting
- Requirements for Municipal Solid Waste Landfills
- Potable Water Reuse and Drinking Water
- Water Reuse and Nature-based Solutions
- Hierarchy of Loading Calculations
- Life Cycle Assessment: Principles and Practice
- Sustainable Materials Management Basics
- Basic Information about Landfill Gas
- Apply Biofilters or Biocovers
Board Certified Environmental Scientist (BCES)
Start with 20 free questions, then review the explanations and any topics you missed.
A rural monitoring station records elevated ozone after air travels downwind from an urban area on a sunny afternoon. Which mechanism best explains this observation?
Board Certified Environmental Scientist (BCES)
Flashcards
Air Resources
Air-cleaner efficiency and airflow
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