April 22, 2026
TOC is one of the core indicators for measuring organic pollution in water bodies. Along with COD and BOD, it forms the "Big Three Organic Indicators" for water quality monitoring. Mastering the meaning and conversion relationship of TOC is a fundamental skill for environmental operation and maintenance personnel.
In daily wastewater treatment operations and water quality monitoring, we often see the "TOC" indicator appearing in test reports and online monitoring data. So, what exactly is TOC? What is its relationship with the commonly used COD? Today, let's systematically get to know Total Organic Carbon (TOC).
