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conventional pollutant is a term used in the USA to describe a water pollutant that is amenable to treatment by a municipal sewage treatment plant. A basic list of conventional pollutants is defined in the U.S. Clean Water Act.[1] The list has been amended in regulations issued by the Environmental Protection Agency:

  • biochemical oxygen demand (BOD)
  • fecal coliform bacteria
  • oil and grease
  • pH (exceeding regulatory limits)
  • total suspended solids (TSS).[2]

The Secondary Treatment Regulation contains national discharge standards for BOD, pH and TSS, applicable to sewage treatment plants in the U.S.[3]

See also

  • Secondary treatment
  • Wastewater quality indicators
  • Water quality


  1. Clean Water Act sec. 304(a)(4), Template:USC.
  2. U.S. Environmental Protection Agency (EPA). Washington, DC. "Conventional pollutants." Template:CodeFedReg Code of Federal Regulations. 1979-09-10.
  3. EPA. "Secondary treatment." Template:CodeFedReg Code of Federal Regulations. 1984-10-16.