For commercial systems, sizing must be based on what metric?

Sizing commercial septic systems is fundamentally based on the facility's anticipated daily sewage flow. This metric is crucial because it directly affects the design and capacity of the septic system, ensuring that it can effectively handle the volume of wastewater generated by the facility on a daily basis.

Understanding the anticipated daily sewage flow allows installers to determine the optimal size for the septic tank and drain field. It ensures that the system can function efficiently without overloading, which can lead to system failures or environmental contamination. Accurate data about expected sewage flow enables proper planning for both the tank size and the absorption area required, adhering to health codes and environmental regulations.

While other factors like the type of waste produced, the number of employees, and local zoning laws can influence aspects of system design, they are secondary considerations once the daily flow is established. Knowing the actual sewage flow is the primary driver for sizing a commercial septic system safely and effectively.