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  1. Effluent - Wikipedia

  2. Effluent Guidelines | US EPA

  3. Wastewater Treatment Water Use | U.S. Geological Survey - USGS.gov

  4. Industrial Effluent Guidelines | US EPA - U.S. Environmental …

  5. Learn about Effluent Guidelines | US EPA - U.S. Environmental ...

  6. What is Effluent? - Wastewater Digest

  7. U.S. Wastewater Treatment Factsheet - Center for Sustainable …

  8. Learn about Effluent Guidelines | US EPA