Who can design the Onsite Wastewater Treatment System (OWTS)?

System options are determined by a soil morphology evaluation conducted by an approved soil evaluator (view a list of approved soil evaluators). Alternative systems must be designed by a profession engineer licensed in the State of Missouri. Conventional systems are often designed in accordance with Private Sewage Disposal Code of St. Charles County by OWTS installers licensed with St. Charles County.

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1. Is an Onsite Wastewater Treatment System (OWTS) a “septic” system?
2. When is a permit required for an OWTS in St. Charles County?
3. How do you determine the gallons per day of treatment?
4. Can I install a lagoon?
5. Can I discharge sewage to a ditch or other location?
6. Can I install a Low-Pressure Pipe (LPP) system?
7. Can I install my own OWTS?
8. Who can design the Onsite Wastewater Treatment System (OWTS)?
9. How much property is required to install an Onsite Wastewater Treatment System (OWTS) (often referred to as a “septic” system)?
10. Can I use a septic system (actually, an Onsite Wastewater Treatment System) to service my property?