Which substance should never be introduced into a septic system?

The introduction of harsh chemicals and non-biodegradable products into a septic system can significantly hinder its operation and lead to costly failures. This is because septic systems rely on a balanced ecosystem of bacteria to break down waste. Harsh chemicals, such as bleach, solvents, and some cleaning products, can disrupt these beneficial bacteria, preventing them from effectively decomposing organic materials. Non-biodegradable products, like plastics and certain personal care items, can accumulate in the septic tank and drain field, leading to clogs and eventual system failure. Maintaining the health of the bacteria in the septic system is essential for ensuring proper waste treatment and avoiding environmental contamination.

In contrast, human waste and clean water are essential components of a septic system’s function, and soap and detergents, when used in moderation, are generally designed to be biologically degradable, thus they are not harmful to the system in normal use.