What is the minimum septic tank volume for a residential application with 5 bedrooms?

In Illinois, the minimum septic tank volume for a residential application typically depends on the number of bedrooms in the house. For a residence with five bedrooms, the associated volume requirement is calculated based on state regulations to ensure proper treatment of sewage.

The standard rule in Illinois is that for each bedroom, a minimum of 150 gallons of septic tank capacity is needed. This means that for a home with five bedrooms, the required minimum volume would be calculated as 5 bedrooms multiplied by 150 gallons per bedroom, resulting in a total of 750 gallons. However, natural considerations and regulations often dictate that an additional capacity buffer be included, leading to the exercise of practical application, which rounds up to the next standard tank size.

Therefore, the minimum septic tank volume for a residential application with 5 bedrooms is specified as 1500 gallons. This capacity allows for proper settlement of solids, reduces the frequency of pump-outs, and ensures that the system can handle peak flows effectively, promoting optimal operation and longevity of the septic system.