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A pump failure at a Tijuana sewage plant, worsened by heat, released toxic wastewater and air pollutants into San Diego’s South Bay, prompting health warnings.
High heat and a failed pump at a Tijuana sewage station caused untreated wastewater to flow into the Tijuana River Valley, releasing dangerous levels of hydrogen sulfide—up to 4,500 times above normal—in San Diego’s South Bay, particularly near Nestor.
The US International Boundary and Water Commission confirmed the pump failure at PB1 triggered transboundary flows at Stewart’s Drain.
Air monitoring detected over 1,000 toxic compounds in aerosolized pollutants, prompting health officials to advise residents to limit outdoor exposure, keep windows closed, and use HEPA air purifiers.
Medical professionals report rising respiratory symptoms and headaches, validating long-standing community concerns about cross-border pollution and underscoring the need for lasting solutions.
Un fallo de bomba en una planta de alcantarillado de Tijuana, empeorado por el calor, liberó aguas residuales tóxicas y contaminantes del aire en la bahía sur de San Diego, lo que provocó advertencias sanitarias.