Reclaimed water quality

The City of Madrid is not only concerned with satisfying its water needs in sufficient quantity, but also that these needs are covered with high quality resources, according to the most demanding national and international quality standards. Basically, these needs focus on the supply of drinking water for the population and the consumption in irrigation of green areas and road basins. This set of data presents the detected values of various typical parameters of control of reclaimed water, according to the measures obtained in the analyses that are carried out with different periodicity in each of them. In relation to the use of reclaimed water that is used for irrigation of green areas and sewerage of roads, it should be noted that the treatment plants of Viveros de la Villa, La China, La Gavia and Rejas have, in addition to the treatments of conventional wastewater treatment (primary and secondary treatments) with complementary facilities to obtain reclaimed water. Such treatment consists basically of decantation, additional filtration and microfiltration, and disinfection by UV rays and sodium hypochlorite. To ensure the quality of this alternative water resource, chemical and microbiological analyses are carried out. You can find more information about this data on the Transparency Portal > Water .