**Attention On-Site Wastewater Professionals**
Please attend our practitioner seminars on October 11th and October 17th !!!
The purpose of the seminars is to provide an update on our new Regulation, O-17.
Identical information will be presented at both seminars.
Email John Bergstrom with questions or to RSVP: firstname.lastname@example.org
An On-Site Wastewater Treatment System (OWTS), commonly known as a septic system, treats sewage on an individual’s property in the ground. Septic systems are installed on properties that cannot be served by publicly-owned wastewater collection and treatment systems which move sewage away from properties. Proper site evaluation, system selection and layout, installation, inspections and maintenance are essential in the onsite treatment of sewage.
On-Site Wastewater Treatment Requirements
Tri-County Health Department regulates all OWTS in Adams, Arapahoe, and Douglas counties and the program includes:
- Issuance of permits to install, repair, expand, use, or operate a system
- Plan review, site evaluation(s) before installation, final inspection(s) after installation, and certification before the system is put into use
- Investigation of malfunctions of systems
Education and Care
- Septic Care & Maintenance Guidelines
- Recommendations for Selecting a Septic Professional
- Standing Water in Monitoring Pipes
- Vegetation Over Absorption Areas
- EPA SepticSmart
- Financial Assistance for OWTS Repairs
- Field Book For Sampling and Describing Soils - Natural Resources Conservation Service
- Mound Systems
- Distribution Networks
- Natural Resources Conservation Service Web Soil Survey
- EPA Onsite Wastewater Treatment Systems Manual - Environmental Protection Agency
- Clarification Regarding the term “Infiltrative Surface” - Colorado Department of Public Health and Environment
- Clarification Regarding Soil Replacement - Colorado Department of Public Health and Environment
- Clarification for Determining the Number of Chamber Units in OWTS Design Under Regulation 43 - Colorado Department of Public Health and Environment
- Clarification on Required Setbacks from On-Site Wastewater Treatment Systems to Wells or Cisterns - Colorado Department of Public Health and Environment
- Vertical Isolation & Media Depth Chart & Explanation - Colorado Department of Public Health and Environment
- Soil Texture-LTAR-Triangle Chart
- Approved Septic Tanks - Colorado Department of Public Health and Environment
- Clarification on the Acceptable Location of a Pump or Dosing Siphon - Colorado Department of Public Health and Environment
- Clarification on the Design of Unlined Sand Filters - Colorado Department of Public Health and Environment
- Evapotranspiration On-Site Wastewater Treatment System Sand Media Policy
Regulation, Applications, and Forms
- Regulation No. O-14, On-Site Wastewater Treatment Systems (revised effective February 23, 2015)
- Regulation No. 0-17 (Effective October 1, 2017) and Summary of Changes
- Shallow Waste Disposal System/Well Inventory Request Form - Environmental Protection Agency (EPA). Required for commercial systems.
- Application for a Septic Permit
- Directions to Property Form
- Sample Site Plot Plan
- As-Built Drawing Form
- As-Built Drawing Example
- Percolation Test Summary and Data Form
- Soil Profile Test Pit Log
- Soil Investigation Summary
- Report, Site and Soil Evaluation Completeness Checklist
- Site Plan and Design Document Checklist
- Conventional Septic Design Worksheet
- Application to Install a Lift Station
- Use Permit Question & Answers
- Application for a Septic Use Permit
- Certified Use Permit Inspectors (Search Engine)
- Use Permit Inspection Form
- Use Permit Inspection Form Guide
- Use Permit Repair Verification Form
- Agreement to Forego Expansion of an OWTS
- Agreement to Repair a Septic
- How to Select a Septic Professional
- List of Septic Engineers
- List of Licensed Installers
- List of Licensed Cleaners / Pumpers
- List of Higher Level Treatment Inspectors
- Certified Use Permit Inspectors (Search)
- NAWT Certificate Renewal Information
Septic System Installers / Contractors
A person or company installing or repairing an On-Site Wastewater Treatment System in Adams, Arapahoe, or Douglas County must be licensed with Tri-County Health Department. To obtain a license, Tri-County must receive a completed application, affidavit of citizenship, and license fee. In addition, the applicant must take and pass the system’s contractor exam. The exam covers various sections of the Onsite Wastewater Treatment System Regulation and you can take an exam at one of our four Environmental Health offices during business hours. The license is valid from January 1 to December 31 and must be renewed every year. If your license is not renewed by January 31, then you will be required to retake and pass the exam.
Septic Tank Cleaners / Pumpers
A septic system cleaner / pumper must be licensed with Tri-County Health Department. To obtain a license, Tri-County must receive a completed application, affidavit of citizenship, and a license fee. The license is valid from January 1 to December 31 and must be renewed every year. Cleaners / Pumpers must also maintain a Septic Cleaners Log.
- How do I get a permit to build a new, or repair an on-site wastewater treatment system (OWTS)?
- Under what conditions must an on-site wastewater treatment system (OWTS) be designed by a Colorado Licensed Professional Engineer?
- How do I get a Use Permit?
- Who can do Use Permit inspections?
- I am moving and need to get my septic system certified. What do I do?
- What is the minimum lot size for an on-site wastewater treatment system (OWTS)?
- How often do I need to pump my septic tank?
- Will I be able to irrigate or have horses where my Soil Treatment Area (STA) is located?
- Can I install a bathroom in a garage, barn, etc., and connect it to my existing on-site wastewater treatment system (OWTS)?
- I am unsure where my onsite waste water treatment system (OWTS) is located. Do you have records of my system?
- I accidentally damaged some components of my septic system. Who should I call to inspect and repair the damage? Do I need a permit?
- Do I need a license to install and repair septic systems?
- How do I become a licensed septic system pumper/cleaner?
- How do I become a Certified Use Permit Inspector?
- Can Tri-County Health Department (TCHD) recommend an Septic System Professional such as an installer or pumper?