Most Larkspur properties on lots greater than 2 acres in size utilize septic systems instead of municipal sewer systems. Today’s septic systems are engineered to provide years of trouble-free service with minimal maintenance. In fact, there are so few maintenance costs that we consider septic systems a cost savings by comparison to municipal sewer service
An Individual Sewage Disposal System (ISDS) usually consists of a septic tank and absorption (or leaching) field. The tank is buried, usually made of concrete or other durable material, has a capacity of 1000 gallons or more, and is divided into two or more compartments with an access lid to each.
Sewage from the house flows to the first compartment of the tank where bacterial decomposition occurs and materials that cannot be digested settle to the bottom as sludge or float to the top as scum. The remaining liquid flows into the second compartment through a series of baffles, where additional bacterial breakdown occurs.