What is an OSSF (On-Site Sewage Facility)?

An On-Site Sewage Facilities (OSSFs, or more commonly “septic systems”) are underground systems used to capture and treat wastewater. OSSFs are most common in rural areas where city sewage systems do not reach.

There are many types of OSSFs, but the three most common are standard septic systems, aerobic systems, and low-pressure dosing systems. Learn more about common septic system types or see an animation of a septic system in action.