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Water: Total Maximum Daily Loads (303d)

Table of Contents

Guidance for 2004 Assessment, Listing and Reporting Requirements Pursuant to Sections 303(d) and 305(b) of the Clean Water Act

July 21, 2003

Watershed Branch
Assessment and Watershed Protection Division
Office of Wetlands, Oceans, and Watersheds
Office of Water
United States Environmental Protection Agency

Memorandum (HTML)

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Full Text (HTML)

Print Version: Memorandum and Full Text (PDF) (38 pp, 312K)



  1. How should waters be Segmented in the Integrated Report?
  2. What are the components of an Integrated Report?
    1. May a State use subcategories or additional categories in its Integrated Report?
    2. Which waters belong in Category 1?
    3. Which waters belong in Category 2?
    4. Which waters belong in Category 3?
    5. Which waters belong in Category 4?
    6. Which waters belong in Category 5?
    7. How should States handle shared waters?
    8. How should States use and report the results of probabilistic monitoring?
    9. How should States use community level bioassessment data?
    10. Why should the Integrated Report include a monitoring schedule and what information should the schedule provide?
    11. What information should the report include regarding public participation and public comments?
    12. What information should the report include documenting that the State considered all available data and information in developing their Integrated Report?
    13. What actions will EPA take on the Integrated Report?
  3. How Could a State Document the Scientific and Technical Rationale for Categorizing Its Waters in Its Assessment and Listing Methodology?
    1. What constitutes an assessment methodology?
    2. How should a State use non-monitored data?
    3. What should a State consider when addressing data information quality?
    4. What should a State consider when addressing data and information representativeness?
    5. How should a State address data and information quantity?
    6. How should a State interpret its WQSs?
    7. How should statistical approaches be used in attainment determinations?
    8. What specific issues arose during the 2002 listing cycle?
    9. Final thoughts on the assessment methodology

Table - Data elements and reporting format for the attainment results calculated using a probabilistic monitoring design

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