What is a Modern Septic System?

PWM Environmental proudly offers fast, affordable, and reliable servicing of all modern septic systems in Middle Tennessee and beyond. Book Today for Same-Day Service and Low Price Guarantee!

How Septic Systems Work

The use of septic tanks to dispose of human waste dates back to the 1800’s. The quality, efficiency and environmental impacts may have changed, but modern septic systems work in much the same way as they did almost 200 years ago:

  1. wastewater flows into a chamber
  2. solids and scum separate from the liquid (effluent)
  3. solids are anaerobically digested
  4. effluent flows into a drain field where it is purified through percolation

This modern septic process is not much different from how the first septic systems worked. Today, modern septic systems are installed after percolation tests (or a perc test) has been conducted to ensure the suitability of the prospective soil for use of a septic system and drain field.

Additionally, modern septic systems are installed with higher quality materials to extend the reliability and lifespan of your tank and septic system. Modern septic tanks are mostly constructed from high-quality concrete, plastics, or fiberglass. There are some modern designs that attempt to allow for more efficient digestion of solids, such as the Imhoff tank or other multi-stage septic tanks.

PWM Environmental septic systems

Modern Septic Systems in Tennessee

The Highland Rim of Middle Tennessee is generally very suitable for utilizing modern septic systems for wastewater disposal and treatment. The soil of this region is most commonly Sequatchie or Loring soil, both of which are loamy soils and offer good drainage and soil depths, which are important factors in the ability of a drainage field to percolate properly and protect the surrounding environment. While this region is generally good for installing a modern septic system, specific sites should still be evaluated prior to installation. Someone considering installing a modern septic system should consult with a professional to ensure soil and site suitability, as well as determining the best tank and drain field design for your needs.

Like any major system in your home, proper maintenance is very important for ensuring the functionality of your modern septic tank. Septic tanks should be inspected regularly, and it is recommended that tanks be pumped and cleaned every 3-5 years. Regular inspections and maintenance will keep your modern septic tank in pristine working order, preventing disastrous back-ups and clogs.

PWM Environmental are Middle Tennessee’s preferred installers and servicers of modern septic systems, servicing Gallatin, Hendersonville, White House, Portland and surrounding areas. Contact us today for more information on installing or servicing your modern septic system.

Why Maintain Your Septic System

Saves you money

Regular maintenance fees every three to five years is a bargain compared to cost of repairing or replacing a malfunctioning system. Repairing or replacing a malfunctioning system can cost anywhere from $3000 to $7,000.

Protects the environment

More than four billion gallons of wastewater are dispersed below the ground’s surface every day. Ground water contaminated by poorly or untreated household wastewater poses dangers to drinking water and to the environment

Protects your property value

An unusable septic system or one in disrepair will lower your property value, and can pose a costly legal liability.


Keeps you and your neighbors healthy

Household wastewater contains disease causing bacteria and viruses and high levels of nitrogen and phosphorus. If a septic system is well- maintained and work properly, it will remove most of these pollutants.

When was the last time your tank was inspected and pumped?

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