The report, with a photograph, showed a labourer cleaning a manhole without the gear on Santhome High Road here on October 25 after the city received heavy rainfall. Some labourers were reportedly spotted going down manholes to clean them that day, despite legislation prohibiting employing manual scavengers.
The report also claimed that the abhorrent practice continued unchecked in many parts of the city.
NHRC observed that manual scavenging violates the fundamental right guaranteed by the Constitution against discrimination on the basis of caste.
"It is considered to be one of the worst surviving symbol of inhuman and untouchability. People engaged in manual scavenging are Dalits who are still considered to be untouchables by many people," it said.
The Prohibition of Employment of Manual Scavengers and Their Rehabilitation Act, 2013, seeks to ensure prohibition of employment of manual scavengers and it appears that the authorities concerned are "totally indifferent" to these responsibilities and allowed such inhuman practice, it added.