A septic tank is a water tight container, usually made of concrete, buried underground on your property. Wastewater from your house plumbing, including water from toilets, sinks, and showers, flows through the main drainage pipe into the tank through an inlet pipe.

Inside the tank, the wastewater goes through primary treatment. Heavy solids and solid materials settle at the bottom and form sludge layers, while lighter materials like grease and oils float to the top as floating scum.

In the middle layer is the liquid wastewater, also called effluent. Naturally occurring anaerobic bacteria break down organic matter in the sewage.

After this step, the tank releases the liquid into the septic drain field (also called a leach field or drain field). The field contains perforated pipes that slowly disperse wastewater into the soil, where wastewater percolates through the ground. The soil provides secondary treatment, removing remaining impurities, suspended solids, contaminants, and harmful organisms like coliform bacteria before the water reaches groundwater.

If your property is not connected to a municipal sewer, you will need a septic system to handle wastewater treatment from your home.

Many homes in rural or semi-rural areas use conventional septic systems because city sewer lines are not available. These systems manage human waste, liquid waste, and household wastewater safely on your own property.

A professional evaluation of your site, soil, and property layout will confirm if a conventional septic design is the right solution for your home.

The size of new septic tanks depends mainly on the number of bedrooms in the house and the amount of wastewater the household produces.

Larger homes generate more liquid waste, which means the tanks and drain field must handle greater flow. A properly sized system ensures the septic system works efficiently without overload.

During planning, professionals review water usage, the size of the home, and the property layout to design a properly functioning septic system that can safely process wastewater for many years.

When wastewater enters the first chamber of the septic tank, the treatment process begins. The tank separates materials into layers.

- Heavy solids sink to the bottom as sludge and settled solids

- Grease and oils float to the top, forming scum

- The middle layer contains liquid effluent

A baffle wall or second chamber helps control the flow of wastewater and keeps solids from leaving the tank. The bacteria inside the tank break down organic matter, toilet paper, and waste.

Once the liquid portion is partially treated, the tank may discharge effluent directly to the septic drain field for further treatment in the soil.

Most septic tank installations take two to five days once permits and planning are completed.

The process includes preparing the site, excavation, installing the septic tank, connecting pipes, building the drain field, and completing inspections. The timeline may change depending on soil conditions, property access, and system size.

Once finished, your home will have a fully installed wastewater system that safely moves sewage away from the house and into the treatment area.

A septic tank should typically be pumped every 3 to 5 years, though the schedule depends on household size and water usage.

Over time, sludge, heavy solids, and floating scum build up inside the tank. If the tank is not pumped, these materials can move into the septic drain field and clog the perforated pipes.

A properly maintained system removes these materials before they cause damage and helps keep the entire septic system operating smoothly.

Septic systems work best when only wastewater, human waste, and toilet paper go down the drains.

Certain materials can damage the system or slow down the bacteria that break down waste. Avoid flushing or draining items like:

- Cigarette butts

- Grease and oils

- Paper towels

- Chemicals or harsh cleaners

- Excessive food waste from a garbage disposal.

Large amounts of food scraps, grease, and chemicals can harm the bacteria that help treat sewage, which can cause the system fails or the drain field to clog.

A septic system fails when wastewater cannot move or treat properly. This can happen for several reasons.

A system may fail if it is not properly sited, meaning the soil or location cannot support wastewater absorption. Problems also occur when tree roots damage pipes, when the tank is not pumped, or when excessive water enters the system.

Using too much water, installing water softeners that increase discharge, or allowing surface water to flow into the system can overload it. When that happens, the effluent cannot properly disperse wastewater into the soil.

Keeping the system properly maintained, protecting the drain field, and scheduling regular inspections helps prevent costly failures and protects the environment, groundwater, and your property.