Ten days after the first complaints, the authorities still have not found the origin of the contamination and have not determined the causes of the problem. The authorities have recognized that the water is contaminated with oils and lubricants and that Nonoalco, along with the surrounding neighborhoods, is ground zero for contamination.

Since last week, Sacmex and Civil Protection brigades have been carrying out explosive tests on tanks and cisterns. They want to avoid at all costs the tragedy that happened in Guadalajara in 1992. That year more than 200 people died and thousands more were injured after several explosions in the sewers that contained fuel. The capital's government has been emphatic in ruling out the presence of gasoline in the pipes. It is also not known if the substance in the water represents a real risk for the community population and the indignation of the neighbors grows by the moment. The water that supplies the two towers of the condominium, where 80 people live, smells like fuel, says the manager of the building.