The Different Types of Septic Systems

August 11, 2023 Published by Leave your thoughts

The Different Types of Septic Systems

Septic systems play a crucial role in managing wastewater in areas where there is no access to a municipal sewer system. They are an efficient and environmentally friendly method of treating and disposing of household wastewater. In this blog post, we will explore the different types of septic systems commonly used, their advantages, and their suitability for various types of properties.

1. Conventional Septic System:

The conventional septic system is the most commonly used type. It consists of a septic tank and a drainfield. The septic tank is designed to separate solid waste from wastewater, allowing the solids to settle at the bottom while the liquid flows to the drainfield for further treatment. The drainfield, also known as a leach field, consists of perforated pipes buried in trenches filled with gravel or other aggregates. The liquid is distributed through these pipes and filtered through the soil, where natural processes remove harmful bacteria and other contaminants.


– Cost-effective option for most properties.

– Suitable for areas with adequate soil drainage capacity.

– Can be designed to accommodate large or small households.

2. Mound System:

A mound septic system is used in more challenging soil and topography conditions. It consists of a septic tank, a pump chamber, and a mound of sand or gravel placed over a layer of special soil, known as engineered fill. The wastewater is pumped from the septic tank to the mound, where it is evenly distributed and filtered through the sand and soil layers, removing contaminants.


– Well-suited for properties with shallow or impermeable soil.

– Provides effective wastewater treatment in areas with a high water table.

– Can be designed to address specific site constraints.

3. Sand Filter System:

Sand filter septic systems are an alternative to drainfields in areas with poor quality soil or limited space. These systems consist of a septic tank and a sand filter chamber. The wastewater from the septic tank is distributed to the sand filter, where it percolates through a bed of sand, removing pathogens and pollutants before being discharged.


– Suitable for sites with inadequate soil quality or space limitations.

– Provides excellent treatment of wastewater effluent.

– Can be constructed above or below ground, allowing flexibility in site design.

4. Aerobic Treatment Unit (ATU):

Aerobic treatment units are advanced septic systems that use oxygen and microorganisms to break down and treat wastewater. Unlike conventional systems, ATUs require a continuous supply of oxygen to promote the growth of aerobic bacteria, which break down organic matter more efficiently.


– Ideal for properties with tight soil conditions or high water tables.

– Provides excellent treatment of wastewater effluent, producing high-quality reclaimed water.

– Can be used in environmentally sensitive areas or for commercial applications.

5. Recirculating Sand Filter System:

Recirculating sand filter systems are a variation of the conventional septic system. They include a septic tank, a pump chamber, and a recirculating sand filter. The wastewater from the septic tank is pumped to the sand filter, where it flows through a bed of sand and is recirculated to the septic tank multiple times for additional treatment before final discharge.


– Suitable for properties with limited space or poor soil conditions.

– Provides enhanced treatment of wastewater effluent.

– Can be used in areas with strict regulatory requirements.


Choosing the right septic system for your property is essential for proper wastewater management and environmental protection. The type of system you select should be based on factors such as soil conditions, site constraints, water table levels, and local regulations. By understanding the different types of septic systems and their advantages, you can make an informed decision and ensure the efficient and sustainable treatment of your household wastewater.

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