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Biosolids

Control of Pathogens and Vector Attraction in Sewage Sludge

This document provides basic information about why pathogen control and vector attraction reduction in biosolids are essential for the protection of public health and the environment. Topics include:

  1. Current federal requirements under Subpart D of Part 503
  2. The different Processes to Further Reduce Pathogens (Class A) and Processes to Significantly Reduce Pathogens (Class B) processes
  3. Role of EPA's Pathogen Equivalency Committee
  4. Vector attraction reduction issues
  5. Sampling and analysis protocols used to meet the quantitative requirements of Part 503
  6. References and additional resources related to biosolids use
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