Overview
- CAMe reported a PM2.5 concentration of 107.3 µg/m3 at 8:00 a.m. at the Santiago Acahualtepec station in Iztapalapa, triggering the Phase 1 action.
- The measure applies to Iztapalapa, Milpa Alta, Tláhuac and Xochimilco, plus 13 State of Mexico municipalities including Chalco, Tlalmanalco, Ozumba, Amecameca and Valle de Chalco Solidaridad.
- As of the 3:00 p.m. update, poor air quality persisted in central and southeastern sectors, and CAMe said it would issue another bulletin by 8:00 p.m. to reassess.
- Public guidance includes avoiding outdoor exercise, keeping indoor air on recirculation with doors and windows closed, not burning materials and promptly reporting fires.
- Operational measures order a 40% particulate reduction at industrial fixed sources, suspend construction, concrete batching and artisanal kilns, intensify checks on polluting vehicles, and keep Hoy No Circula on its normal schedule without Doble Hoy No Circula.