Septic Tank Sizing

Septic Tank Sizing. The effective liquid capacity of septic tanks for dwellings shall be based on the number of bedrooms proposed or anticipated as shown in the table below: Septic Tank Sizing by Number of Bedrooms Number of Bedrooms Number of Occupants Minimum Effective Liquid Capacity (gallons) without baffle or effluent filter Minimum Effective Liquid Capacity (gallons) with baffle or effluent filter 2 or less 4 or less