What are the PCB limits in transformer oil?

The PCB limits in transformer oil are established to minimize environmental and health risks associated with polychlorinated biphenyls (PCBs). In many jurisdictions, the acceptable limit for PCBs in transformer oil is typically set at 50 parts per million (ppm) or lower. Transformers containing PCB levels above this threshold are often subject to strict regulations regarding their handling, disposal, and remediation to prevent contamination.