The air quality contingency plan remains active as Mexico City grapples with rising pollution levels this week. The Comisión Ambiental de la Megalópolis (CAMe) confirmed on Wednesday evening, February 26, 2025, at 8:00 PM, the implementation of the 'Doble Hoy No Circula' program, which will take effect on Thursday, February 27. This measure aims to combat the increase of ozone levels which heightened to 157 parts per billion (ppb) at the Tlalnepantla monitoring station.
This escalation was attributed to intensified solar radiation coupled with weak winds, leading to stagnant air conditions conducive to pollution accumulation. The program will restrict the circulation of specific vehicles from 5:00 AM to 10:00 PM, mandatorily prohibiting the operation of vehicles with verification stickers of 2, and certain vehicles with verification stickers of 1, depending on the last digit of their license plates.
"The high-pressure system is expected to persist, creating similar environmental conditions, characterized by low ventilation and high solar radiation, which favor the formation of ozone," reported CAMe. With temperatures anticipated to reach around 28 °C, health officials urge residents to adhere to restrictions and monitor air quality advisories closely.
According to the guidelines, the 'Doble Hoy No Circula' will remain effective until at least 10:00 AM on February 27, with potential updates expected later. If conditions improve overnight, residents may get the green light to use their vehicles post-10 AM. The commission anticipates possible notifications of suspension at several intervals throughout the day: 1:00 PM, 3:00 PM, 5:00 PM, and 8:00 PM.
For those affected by the restriction, it's important to note the difference when conditions are activated versus when they are suspended. "When the contingency is activated, the restrictions take effect the following day, whereas when suspended, they take effect immediately," explained the authorities. This distinction allows residents some flexibility, knowing their commute plans can adjust based on the latest reports.
This contingency situation applies not only to Mexico City but also to several municipalities in the State of Mexico, where residents face similar vehicle restrictions. Following CAMe's statements, multiple vehicle categories are exempt from the restrictions under the environmental emergency: electric and hybrid vehicles, those with specific environmental stickers, and emergency service vehicles.
On Thursday, permitted vehicles include those with stickers '00' or '0' not restricted by the color green and those with specific exemptions such as for emergencies or designated transport services. Authorities have also confirmed multi-role vehicles, particularly those serving public functions or emergencies, will remain operational as usual.
Notably, violation of the 'Hoy No Circula' program can carry fines ranging from 2,075 to 3,113 pesos (20 to 30 times the Unidad de Medida y Actualización, UMA). CAMe is strict about enforcing compliance amid worsening air quality, emphasizing public health as their primary concern.
With the contingency taking effect, local officials also recommend avoiding outdoor activities such as exercise or organized events between key hours when pollution levels reach their peak. Organizers of public events are urged to postpone gatherings to protect the community from exposure to harmful pollutants.
Many citizens express concern over air quality issues, which are not new to Mexico City. Historically, the city's geographical layout and climate conditions create challenges for air quality management. Activists and environmental organizations are rallying for longer-term solutions to pollution, pushing for enhanced public transportation, industrial regulations, and green areas within urban settings.
While some residents welcome the immediate action as necessary, others are worried about the impact the restrictions will have on their daily lives. Balancing the immediate need for cleaner air with practical mobility needs has prompted discussions about sustainable urban transport solutions.
The air quality situation will continue to be monitored and evaluated, ensuring residents stay informed. The CAMe will manage this integrated approach not only for immediate short-term fixes but also to establish lasting practices and encourage eco-friendlier transportation moving forward. Staying updated with their reporting will prove invaluable for those needing to navigate the restrictions on Thursday.