Drain Field Size Calculator

Calculate Drain Field Size



Formula

To calculate the Drain Field Size (DFS):

\[ DFS = \frac{DF}{AR} \]

Where:

What is Drain Field Size?

Drain field size is a critical component of a septic system, determining the area necessary to properly filter and treat wastewater as it percolates through the soil. The size of the drain field is influenced by the daily flow of wastewater and the soil’s absorption rate. Proper sizing is essential to prevent system failure and environmental contamination.

Example Calculation

Let's assume the following values:

Using the formula:

\[ DFS = \frac{500}{0.5} = 1000 \text{ square feet} \]

The Drain Field Size is 1000 square feet.