He said the Perak department of veterinary services (DVS) conducted a study which confirmed that the farm waste is first discharged into a pond, where it is decontaminated using scientifically approved methods, before being released into the river.

“The reading of pollutants discharged into the river is below 10 ppm (parts per million), which is within safe levels.

“Therefore, the waste disposal from these nine pig farms does not cause pollution. If other parties have different studies, please provide the evidence,” Bernama quoted him as saying after a Madani dinner at Coldstream, Tapah, last night.

Mohamad said the authorities will continue to monitor all pig farms to ensure compliance with the law and take strict action in cases of violation or pollution.

“I know this issue is sensitive, especially involving the feelings of the various races. However, it is important that we clarify the facts, do not spread wrong information and cause panic among the residents,” he said.

The issue of pig farms has become a central campaign point for Perikatan Nasional, with concerns raised over their presence in a predominantly Malay area.

PAS vice-president Idris Ahmad previously claimed that 30 farms had been approved in the Batang Padang and Muallim districts, based on field observations.

However, the claims have been debunked by Perak executive councillor A Sivanesan.