On February 27, 2025, the Commission for the Environment of the Megalopolis (CAMe) announced the suspension of environmental contingency phase I, marking good news for drivers and residents of the Mexico City metropolitan area. With the improved air quality, the 'Hoy No Circula' program will resume its normal operations on February 28, allowing many vehicles back on the roads.
According to CAMe, "La información más reciente del Sistema de Monitoreo de la Calidad del Aire de la Ciudad de México indica que para mañana ingresará al Valle de México mayor humedad y la nubosidad se incrementará gradualmente favoreciendo la ventilación." This indicates expectations for increased humidity and cloud cover, which contribute to favorable conditions for air distribution, thereby improving overall air quality.
With this change, only vehicles with blue stickers, whose plates end with the numbers 9 and 0, as well as those with environmental holograms 1 and 2, are restricted from circulating on Friday. The Hoy No Circula program continues to apply across all 16 boroughs of Mexico City and 18 municipalities of the State of Mexico. Electric, hybrid cars, and those with ecological certificates can still circulate freely, as can vehicles carrying medical staff or used for transportation services such as school transport and ambulances.
The CAMe also noted the importance of the monitoring system for air quality, stating, "Debido a que las concentraciones horarias de ozono fueron menores a las establecidas en el Programa para dar concluida la contingencia." This reflects the basis upon which the contingency was lifted and serves as reassurance for citizens concerned about their health due to prior rising ozone levels.
During episodes of environmental contingencies such as this, residents are recommended to avoid certain activities, particularly those involving physical exertion outdoors, which can exacerbate health risks linked to air pollution. CAMe has advised against exercise practices like running and cycling, as well as recreational activities open to the elements. These restrictions primarily aim to protect vulnerable populations, including children, the elderly, and those suffering from respiratory conditions.
Residents are also encouraged to reduce private vehicle usage and instead utilize public transport or carpooling options. Motorists are advised against refueling during peak heat times for the day and to limit lengthy journeys or unnecessary trips to minimize additional emissions.
For those concerned with specific vehicle regulations during such contingencies, exempted vehicles continue to include not just electric and hybrid options but also those qualified under specific conditions, such as medical emergency vehicles, school transport, and funeral services.
Current air quality measurements within various municipalities showcase diverse conditions, with the air quality index indicating acceptable levels across regions, such as Cuajimalpa and Miguel Hidalgo reporting "level green," meaning good air quality. Some areas show "level yellow," indicating acceptable air quality but with moderate health risks.
Officials have urged sensitive groups to curtail intense outdoor activities. "Considerando que la calidad del aire es aceptable, enjoy outdoor activities and remain informed about the air quality's progression," they noted.
Monitoring will remain continuous, but for now, residents can breathe easier. With the CAMe’s strategic plans and forecasts aligning positively, the citizens of the Mexico City metropolitan area are optimistic about their air quality going forward. Understanding the dynamics of these environmental measures plays a significant role not just for immediate health but for long-term environmental stewardship as well.