India, Feb. 20 -- A survey conducted by the Municipal Corporation Gurugram (MCG) last month revealed that nearly 66% of sewer connections in the city are illegal.

Of approximately 550,000 households under MCG's jurisdiction, only about 180,000 have legal sewer connections, the findings indicated.

The survey, compiled on Thursday was carried out through satellite mapping and GIS-based verification, identified illegal sewer connections as a major reason for frequent sewer overflows, officials said.

Officials said the problem is most prominent in unauthorised colonies and rural pockets, where sewer lines have been connected to the main network without approval or capacity assessment.

According to MCG records, seen by HT during a visit to...