New Delhi, Jul 23 (IANS): The number of households without drainage facility has gone up by 2.5 million over the past 10 years, according to information compiled in the statistical compendium of urban indicators on the basis of population census.

However, the overall percentage of such houses has gone down.

The compendium, brought out by the Ministry of Housing and Urban Poverty Alleviation, has vast data on aspects related to urbanisation, including access to housing, basic amenities and health indicators.

It also has data on trends in urbanisation and urban poverty.

It has been compiled on the basis of information in Census 2011 and Census 2001, apart from results of surveys of National Sample Survey Organisation and other sources.

The number of houses with "no drainage" had gone up from 11.88 million in 2001 to 14.38 million in 2011. But, their percentage has gone down from 22.1 percent to 14.38 percent.

There is a similar increase in the number of urban households whose dwellings were "dilapidated".

It was 1.93 million in 2001 and 2.27 million in 2011. However, their percentage fell from 3.6 percent to 2.9 percent.

There was marginal decline in households without latrines with their numbers going down from 14.11 million in 2001 to 14.7 million in 2011.