[Dan_-]

This is how it is where I live. My “septic” is a self-contained wastewater treatment plant that must be inspected semi-annually and actively maintained. The effluent is technically potable. It uses about 25% of my total electrical consumption.

[Scubabear68]

Our septic is gravity fed on a small hill. It is very basic, and we do not need multiple inspections per year. Are you sure these aren’t County required inspections? I live in Hunterdon County and never heard of it.

That said I know it depends on your land conditions and geography.

[thedougd]

They’re referring to a level IV or V system. They’re used when the ground doesn’t perc well.