Air Quality
CAMe declares phase 1 environmental contingency in CDMX and Edomex due to heat wave
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The Environmental Commission of the Megalopolis (CAMe) declared Phase 1 Environmental Contingency on Saturday, April 25, in Mexico City and Mexico State due to high ozone levels from a heat wave. Expanded vehicle restrictions apply today, Sunday, April 26, under the Double Hoy No Circula program from 5:00 to 22:00. Temperatures in CDMX will reach 30 to 32 degrees Celsius.
Chicago has deployed the nation's largest community air quality monitoring system with 277 sensors across the city. The network originated from a 2021 civil rights complaint over industrial pollution in minority neighborhoods.
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Jakarta's air quality ranked second worst globally on Wednesday morning according to IQAir data. The air quality index stood at 175 with PM2.5 concentration at 88.5 micrograms per cubic meter. Lahore in Pakistan held the top spot with an index of 382.
The Comisión Ambiental de la Megalópolis (CAMe) has decided to maintain Phase I ozone air contingency in the Mexico City Metropolitan Area on Saturday, February 14, 2026, marking the third day of vehicle restrictions due to poor air quality. The peak ozone level recorded was 156 ppb at the Atizapán station in the State of Mexico. Authorities attribute the situation to a high-pressure system that promotes pollutant accumulation.
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Mexico City and the State of Mexico avoided an environmental contingency and double Hoy No Circula for Thursday, February 12, thanks to wind gusts that improved air quality on Wednesday, February 11. The Metropolitan Environmental Commission reported ozone levels of 156 ppb in Coyoacán, but cloudiness and wind quickly reduced pollution. The Hoy No Circula program will operate normally on Thursday.
인접 허베이성 농촌 주민들은 석탄에서 전환 후 집을 충분히 데우기 부담스럽다고 말한다. 올해 겨울 북중국 주간 기온이 자주 영하로 머물러 많은 농촌 주민들이 추위를 견디는 수밖에 없다.
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The Environmental Commission of the Megalopolis suspended the ozone environmental contingency in Mexico City and the State of Mexico on Friday, January 9, 2026, due to improved air quality. This avoids the Double Hoy No Circula for Saturday, January 10, which will operate normally. Pollutant concentrations decreased thanks to favorable weather conditions.
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