What happens to PCB levels in Lake Erie?

Polychlorinated biphenyls (PCBs) levels in Lake Erie have generally shown a declining trend due to regulatory measures and pollution control efforts. However, sediment and fish tissue still contain significant concentrations of PCBs, which can impact aquatic life and pose health risks to humans who consume contaminated fish. Ongoing monitoring and remediation efforts are necessary to further reduce PCB levels and mitigate their effects on the ecosystem. Despite improvements, legacy pollution continues to be a concern for Lake Erie.