Wastewater Treatment

Regulations

  1. Lake County Wastewater Treatment System Regulations (PDF)
  2. Montana Dept of Environmental Quality - Circular DEQ4 (PDF)
  3. General Requirements for Wastewater Systems (PDF)

Forms

  1. Septic Search Request Diagrams of Existing Systems (PDF)
  2. Wastewater Treatment System Application 2023 (PDF)
  3. Groundwater Monitoring Application, Report and Well Installation (PDF)
  4. Variance Request Application (PDF)

Information

  1. Filter Alert (PDF)
  2. Water Softener Brochure (PDF)
  3. Montanas Regulations On Site Wastewater Treatment Systems (PDF)
  4. Environmental Consultants July 2023
  5. Licensed Installer List Aug 2023 (pdf)

Additional Information

  1. Drip Irrigation Systems (PDF)
  2. Effluent Line from Well (PDF)
  3. Replacement within Floodplain (PDF)
  4. Resolution - 4 Feet of Natural Soil Separation (PDF)
  5. Seasonal Use of Holding Tanks (PDF)
  6. Separation Distance Effluent and Water Lines (PDF)
  7. Separation Distance Sealed Component to Property Line and Foundation (PDF)
  8. Setback from 25 Percent Slope (PDF)
  9. Setback from Floodplain (PDF)
  10. Special Uses of Holding Tanks (PDF)
  11. Standard Variance - Setback of Sealed Wastewater System Components (PDF)