What does the long-term acceptance rate (LTAR) measure?

The long-term acceptance rate (LTAR) specifically measures the flow rate at which a mature onsite sewage treatment system can operate without failure. This rate is essential for determining how much wastewater the system can effectively handle over a prolonged period while maintaining its functional integrity. A well-established LTAR indicates that the system can process sewage efficiently without leading to issues like backups or system failures, which could arise from overloading.

Understanding LTAR is particularly critical for designing septic systems, assessing their capacity, and ensuring that they meet the environmental regulations in South Carolina. It reflects the system's ability to adapt to changes in flow or load while continuing to perform its intended function. Additionally, LTAR helps in planning for maintenance and ensuring long-term sustainability of the onsite wastewater treatment system.