Surveillance cameras set up by the State Pollution Control Board (PCB) along the Eloor-Edayar industrial stretch of the Periyar have stopped functioning.
The PCB had installed nine cameras to monitor changes in colour and turbidity parameters of the river. The cameras were installed after the earlier units had remained defunct for long.
Board officials admitted that the cameras had stopped working. The cable network for these units is set up along the FACT premises. It got snapped recently, resulting in the breakdown of the surveillance cameras, they said.