Nearly 30 people residing in the city's Ganguly Bagan area have been diagnosed with jaundice in the last few weeks, a senior Kolkata Municipal Corporation (KMC) official said on Saturday.
Several residents of the locality in south Kolkata's Baghajatin area had to be hospitalised after they were tested positive for jaundice, the official said.
To determine the cause of the "outbreak" of the disease, civic body officials have collected water samples from at least 52 different places of Ganguly Bagan and its vicinity, he said.
"We are expecting the sample report by Monday," the official said.
Meanwhile, residents of the area have been asked to be cautious about the quality of water they consume.