Aerobic septic systems use a special kind of chambered septic tank and an above-ground sprinkler system. They require electricity and a maintenance contract, but repairs are very easy if something were to break. For this reason, Aerobic systems may have a higher upfront cost than other systems, but they are better in the long run. They are usually required if you live in an area that has a lot of clay in the soil, or if there is a risk of contaminating water sources such as in a floodplain.
“Conventional” or “Standard” septic systems use 2 simple concrete tanks and an underground drain field. Wastewater flows through the tanks and into a underground network of pipes or chambers that allow the water to slowly seep through the soil. These conventional systems can be installed in areas that have sandy or loamy soil. They are simple gravity-flow systems that require no electricity to function. However, if the system becomes over-loaded or the drain field becomes compromised, repairs can be very costly or even impossible.