Water reuse

Consumption of reused water doubled in 2007 (331,395 cubic metres. The reused water comes from construction, usually from water treatment systems (decantation and pH correction) on site generated mainly in concrete plants and tunnels. This water is used for watering pathways, dust prevention, washing tanks and, when possible, in concrete production. Another possible source of water is that from draining flooded foundations.

Elsewhere, as part of a policy of managing demand and saving of drinking water, a priority objective both at national level and in the European context, the city council of Madrid has decided to reuse treated wastewater for watering municipal parks and gardens, and for street cleaning. The original waste comes from the E.R.A.R. (Wastewater Regeneration Plant) in Valdebebas-Rejas, located to the north-east of the city. The services provided by CESPA in the city council of Madrid during 2007 involved consumption of 149,153 m3 of this regenerated for the San Blas, Chamartín, Pau Las Tablas, Pau SanChinarro and Vicálvaro contracts.

 Water reuse