How many square feet per bedroom are required for a perc rate of 5-30 minutes per inch?

The requirement of 300 square feet per bedroom for a perc rate of 5-30 minutes per inch is based on guidelines established for the design of on-site septic systems, particularly concerning soil absorption capabilities. A perc rate within this range indicates that the soil has moderate drainage properties, which means it can absorb wastewater at a reasonable rate without overwhelming the system.

In general, the area required per bedroom is calculated to ensure that the septic system can handle the wastewater generated by the household effectively. By allocating 300 square feet per bedroom, it provides sufficient space for the absorption field to mitigate the risk of overflow or failure since moderate perc rates require a larger area to allow for proper effluent dispersion and absorption.

Understanding how perc rates relate to soil drainage and absorption is essential for designing a functional and compliant septic system that protects public health and the environment. Inadequate sizing based on these guidelines could lead to system malfunctions or contamination risks.