Three Layers in a Septic Tank: Scum, Effluent, and Sludge

A well-functioning septic tank is the heart of this system, and it consists of three crucial layers: the scum layer, the effluent layer, and the sludge layer.

Why do I need to clean my septic tank every three years? - Safe

How a Septic Tank Works

This Is Why Your Septic Tank Needs To Be Pumped - Ground Stone

Your Wastewater System: The Septic System

Septic Systems: What to Ask When Buying a House, VCE Publications

Should You be Concerned if a Septic System has No Scum Layer?

Understanding the Workings of a Septic Tank: A Comprehensive Guide

How Do Septic Tanks Work And What Do They Look Like?

What Is a Septic Tank and How Does It Work? – Fresh Water Systems