Pretreatment

Objective

By placing controls and/or limits on levels of certain pollutants in wastewater discharged to your sewer system, you:

  • Prevent interference with the operation of your wastewater treatment plant.
  • Prevent the introduction of pollutants that could pass through your wastewater treatment plant untreated and into the receiving body of water.
  • Improve opportunities for reuse or recycling of wastewater and sewage sludge.
  • Prevent the introduction of pollutants that could cause health or safety problems to the public or the environment.

Manuals

Contact Us

  1. Email the Wastewater Division

    Physical Address
    900 7th Avenue North
    Lewiston, ID 83501

    Mailing Address
    P.O. Box 617
    Lewiston, ID 83501

    Phone: 208-750-1195
    Emergency Phone: 911

    Directory

Standard Drawings

  1. I-01 1,000-Gallon Grease Interceptor (PDF)
  2. I-02 1,000-Gallon Sand/Oil Water Separator (PDF)
  3. I-03 1,500-Gallon Grease Interceptor (PDF)
  4. I-04 1,500-Gallon Sand/Oil Water Separator (PDF)
  5. I-05 2,000-Gallon Grease Interceptor (PDF)
  6. I-06 2,000-Gallon Sand/Oil Water Separator (PDF)
  7. I-07 2,500-Gallon Grease Interceptor (PDF)
  8. I-08 2,500-Gallon Sand/Oil Water Separator (PDF)
  9. I-09 3,000-Gallon Grease Interceptor (PDF)
  10. I-10 3,000-Gallon Sand/Oil Water Separator (PDF)
  11. I-11 Sand Trap with Traffic Grate (PDF)
  12. I-12 Manhole Frame and Cover (PDF)

Forms

  1. FOG Maintenance Log
  2. Pump Out Report
  3. Signatory Authorization