Septic Systems

Basic Septic System


Most septic systems are a simple design with a two compartment tank and drain field.  The septic tank is a watertight box, usually made of concrete or fiberglass, with an inlet and outlet pipe.  The septic tank treats the wastewater by holding it in the tank long enough for solids and liquids to separate.

Sludge and Scum


Solids lighter than water (such as fats, oils, and grease) float to the top forming a layer of scum.  Solids heavier than water settle at the bottom of the tank forming a layer of sludge.  The layers of sludge and scum remain in the septic tank where bacteria found naturally in the wastewater work to break the solids down.  The sludge and scum that cannot be broken down are retained in the tank until it is pumped.

Septic Drainfield

Standard Drain Field


A standard drain field is a series of trenches or a bed lined with gravel or course sand and buried one to three feet below the ground surface. Perforated pipes or drain tiles run through the trenches to distribute the wastewater. The drain field treats the wastewater by allowing it to slowly trickle from the pipes out into the gravel and down through the soil.

Caring for Your Septic System


There are many ways to extend the life and functionality of your septic system

Have Your Septic System Inspected


Please be sure to have your septic system inspected annually and pumped at least every three years.

Questions About Connecting to Sewer


If you have questions please contact our Senior Engineering Technician.

Questions About Our Septic Program


If you have questions please contact our Surface Water Program Coordinator.

Want a Free Septic Inspection?


Please take the time to answer these questions to be entered to win a free septic inspection.