New Delhi: Nearly 12 lakh households have so far conducted self-enumeration across 11 states and union territories for the Houselisting Operation (HLO) phase of Census 2027. More than half of these families have availed the self-enumeration facility in the last four-five days.With the conclusion of the 15-day self-enumeration window in Andaman and Nicobar Islands, Goa, Karnataka, Odisha, NDMC and cantonment areas of Delhi NCR, Mizoram, Sikkim and Lakshadweep on Wednesday, census field operations, involving door-to-door enumerators, will begin in these eight states/UTs from Thursday.The field operation will last for a month – till May 15. Given that the 12 lakh households enumerated so far constitute only a small percentage of the total population of the eight states, the enumerators’ visits will be important to obtain complete and accurate data on housing conditions and household amenities. A Home Ministry spokesperson said the HLO phase forms an essential basis for evidence-based planning and formulation of welfare and development programmes.The self-count window is open till April 19 in Gujarat and Dadra and Nagar Haveli and Daman and Diu and till April 24 in Uttarakhand. It will start in Andhra Pradesh, Arunachal, Haryana, Chandigarh, MP and Chhattisgarh from Monday and in Bihar from Friday.