Under what conditions must an on-site wastewater treatment system (OWTS) be designed by a Colorado Licensed Professional Engineer?
A Colorado Licensed Professional Engineer must design a system if any of the following occur: (a) the following soil types are identified within 4 feet below the depth of the proposed soil treatment area (STA): 0, 3A, 4, 4A, and 5, and treatment levels TL2, TL2N, TL3, and TL3N (b) groundwater, bedrock, or a restrictive layer is present within 4 feet below the depth of the proposed STA, (c) the ground slope at the area of the proposed STA is greater than 20%, or (d) the proposed system is a commercial system, (e) the proposed system utilizes higher level treatment, (f) the proposed system falls into the category of an experimental system.

Show All Answers

1. How do I get a permit to build a new, or repair an on-site wastewater treatment system (OWTS)?
2. Under what conditions must an on-site wastewater treatment system (OWTS) be designed by a Colorado Licensed Professional Engineer?
3. How do I get a Use Permit?
4. Who can do Use Permit inspections?
5. I am moving and need to get my septic system certified. What do I do?
6. What is the minimum lot size for an on-site wastewater treatment system (OWTS)?
7. How often do I need to pump my septic tank?
8. Will I be able to irrigate or have horses where my Soil Treatment Area (STA) is located?
9. Can I install a bathroom in a garage, barn, etc., and connect it to my existing on-site wastewater treatment system (OWTS)?
10. I am unsure where my onsite waste water treatment system (OWTS) is located. Do you have records of my system?
11. I accidentally damaged some components of my septic system. Who should I call to inspect and repair the damage? Do I need a permit?