Calculate pollutant loadings discharged to surface waters from NPDES permittees using EPA's Water Pollutant Loading Tool web services

domain: echo.epa.gov · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗

Steps

  1. Review the Loading Tool REST services documentation (echo.epa.gov/tools/web-services/loading-tool) to identify the relevant search/download endpoint (custom search, everyday search, or lookup)
  2. Query facility- or watershed-level discharge data using the Loading Tool's search endpoints with state/watershed/industry parameters
  3. Retrieve pollutant loading calculation results, which combine DMR-reported concentrations and permitted flow to estimate mass loadings
  4. Use the lookups endpoints to resolve industry (SIC/NAICS) or pollutant group codes referenced in the results
  5. Export the full result set through the tool's download endpoint for offline analysis

Known gotchas

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