If businesses or individuals emit a substance into a water source as part of their facilities' operation,they are only required to have a permit if they are causing pollution.

Question

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Businesses or individuals must obtain a permit under the National Pollutant Discharge Elimination System (NPDES) or equivalent state systems if they discharge pollutants into waters of the United States, regardless of whether they are currently causing pollution. This requirement is to regulate and ensure that such discharges meet environmental standards to protect water quality.

If Businesses or Individuals Emit a Substance into a Water