IIT against storm drain covers
Scientists from Indian Institute of Technology-Delhi working on city's drainage master plan don't think it's a good idea to cover storm water drains. While there may not be any harm in covering drains carrying only storm water, most of Delhi's storm water drains carry sewage water that emanates noxious gases and can cause severe groundwater pollution if trapped. A team from IIT is studying the impact of covering drains along with other aspects of the drainage system.