Why Does My Septic System Smell?

A properly operating septic system should not produce persistent strong odours. If you’re noticing a sewage odour around the tank, in the yard or coming back up through the drains, it’s a sign that something inside the system isn’t right.

How a septic system works

A septic tank is a living system. It relies on bacteria to break down the solids in household wastewater. When those bacteria are healthy and plentiful, waste is digested efficiently and the system runs quietly in the background. When they’re not, solids build up, the system struggles and odours appear.

Common causes of septic smells

Harsh chemicals: bleach, antibacterial cleaners, drain cleaners and some toilet products kill the good bacteria the tank needs.
Medications and antibiotics passing through the household.
Overloading: lots of guests, laundry days or long showers can flush bacteria out before they’ve done their job.
Fats and grease from the kitchen.
A tank that’s overdue for attention.

Avoid unnecessary harsh chemicals

This is the most important rule for septic owners. Only use products that are labelled septic safe. Every time a strong chemical goes down the drain, it sets back the biology the tank depends on.

Support the biology with ProPower

ProPower Septic & Bio Tank treatment is a probiotic septic tank treatment that tops up the system with beneficial microbes. They help digest solids, control odour-producing bacteria and keep the tank working the way it should. It’s 100% natural and intended for use as directed in compatible wastewater systems.