Septic System Professionals

Resources

Colorado Department of Public Health and Environment

• Clarification Regarding the term "Infiltrative Surface"
• Clarification Regarding Soil Replacement
• Clarification for Determining the Number of Chamber Units in OWTS Design Under Regulation 43 
• Clarification on Required Setbacks from On-Site Wastewater Treatment Systems to Wells or Cisterns
• Vertical Isolation & Media Depth Chart & Explanation
• Mound Guidance Document

Additional Resources

Watch this video of an onsite wastewater treatment system contractor installing a non-pressurized drip dispersal system.

• Field Book For Sampling and Describing Soils
• Mound Systems
• Distribution Networks
• Natural Resources Conservation Service Web Soil Survey
• EPA On-site Wastewater Treatment Systems Manual
  
• Soil Texture-LTAR-Triangle Chart
• Evapotranspiration On-Site Wastewater Treatment System Sand Media Policy
• Evapotranspiration Guidance Manual
• Evapotranspiration Design Spreadsheet - ET99
• Evapotranspiration Design Spreadsheet - ET99PEAK
• Evapotranspiration Design Spreadsheet - ETAVG3
• Denver Metro Area Watersheds and Flood Zone Map
• National Wetlands Inventory