Biochemical Oxygen Demand (BOD): From Sample to Report

Synopsis

This webinar provides a comprehensive, practical overview of Biochemical Oxygen Demand (BOD) analysis, guiding participants from sample collection through final reporting. Topics include approved methods, sample preservation, reagents, dilution water preparation, seeding, quality control, dissolved oxygen measurement, incubation, and calculations for both seeded and unseeded samples. Common problem areas such as blank depletion, poor GGA recovery, and insufficient sample depletion are discussed, along with troubleshooting strategies. Designed for laboratory analysts, Technical Directors/Specialists and supervisors. The session emphasizes producing consistent, valid BOD results and includes hands-on calculation examples to reinforce key concepts.

Change needs to be managed effectively to minimize risks to the laboratory. Risks may be related to efficiency, productivity, finances, safety, quality and other operational areas.

Examples of changes that need to be managed in an environmental lab include:
• Relocating a laboratory
• Implementing a new LIMS
• Implementing new methods and instrumentation
• Staffing changes
• Laboratory renovations.

Learning Objectives

  • have increased confidence in performing BOD analyses correctly and consistently
  • improve ability to prepare dilution water, reagents, and seed sources
  • understand when and how to seed samples—and how seeding affects result
  • have greater accuracy in dissolved oxygen measurement, incubation, and calculations
  • see improved evaluation of batch quality control and result validity
  • have improved troubleshooting skills for common BOD issues, including blank depletion, poor GGA recovery, and insufficient sample depletion
  • be able to perform BOD calculations, including seeded and unseeded samples
  • have enhanced consistency and defensibility of reported BOD results
  • use guidance on appropriate training frequency for new staff, procedures, instruments, and annual requirements
  • TNI training requirements, including documentation expectations
  • be able to develop stronger onboarding processes that support analyst competence and confidence from day one
  • improve safety awareness, ethical decision-making, and data integrity practices
  • consistently implement initial and ongoing method training, SOP review, and competency assessment
  • to see enhanced continuity during staff turnover and smoother adoption of new methods and equipment

    • Audience

    This course is designed for Quality Assurance Personnel, Laboratory Directors/Specialists, Analysts, and Laboratory Department Supervisiors.

    Digital Badges Associated with this Course

    None


    Fees

    $120 for TNI members
    $145 for non members

    Group rates are available: Each purchased webcast is to be viewed by only one student. If you would like multiple viewers, separate purchases must be made. A group rate of $575 for TNI members or $700 for non-members is available for groups of 5-10 students at a single location.

    Certificates: A Certificate of Attendance (CoA) is provided for this training. A Certificate of Completion (CoC) may be purchased for an additional $25. A passing score of at least 70% must be received on the exam in order to receive CEUs and a CoC. Scores of less than 70% will be issued a CoA. For a CoA you will not need to take the quiz and you will not receive CEUs. See FAQs for additional information.






    Start Date

    06/30/2026 11:00 AM

    Length

    3 hours

    CEUs

    0.3

    Presented By:

    Mary Johnson

    Mary Johnson, a graduate of Loyola University of Chicago, was the long time Laboratory Manager at Four Rivers Sanitation Authority. She is a past chair of WEF’s Laboratory Practices Committee and currently represents WEF on the Environmental Monitoring Coalition. She is also a member of the Illinois WEA’s Laboratory Committee and holds an Illinois Class I Wastewater Operator Certificate.