Metro de Madrid reopened Sol station at 11:00 p.m. after keeping it closed since 12:15 p.m. this Friday due to elevated levels of ammonia detected in the area.
🔊 En media hora se procederá a abrir la estación de Sol tras constatar objetiva y documentalmente, con el resultado de los análisis, que las condiciones de seguridad y salud necesarias se han restablecido. pic.twitter.com/IoD0yMpMau
— Metro de Madrid (@metro_madrid) October 17, 2026
The company, which announced the reopening on the social network X, stated that the facility was back in operation “after objectively and documentarily verifying,” with the results of the analyses, that the necessary safety and health conditions had already been reestablished.
The supposed origin of the problem: ventilation shafts
The closure affected the three Metro lines that converge at Sol and came after an accumulation of urine, excrement, and other organic waste was detected in the ventilation shafts, linked to the housing encampment in Puerta del Sol.
The measure had been announced that same Friday by Isabel Díaz Ayuso, president of the Community of Madrid, who attributed the decision to a request for occupational risk prevention and from the unions.
Unions deny having requested the closure
However, CC.OO., UGT, and Solidaridad Obrera later distanced themselves from the decision and assured that they had not requested the closure of the station.
With the reopening already executed, the discrepancy now remains open regarding the origin of the measure and the real weight of each of the versions disseminated during the day.
