On February 27, 2025, the City of Mexico and the State of Mexico activated the "Doble Hoy No Circula" program amid concerning air quality levels. The Comisión Ambiental de la Megalópolis (CAME) detected alarming concentrations of ozone measuring 157 parts per billion (ppb) at the Tlalnepantla monitoring station, prompting authorities to announce the phase one air quality contingency.
The "Hoy No Circula" program, devised by the Secretaría del Medio Ambiente de la CDMX (SEDEMA) back in 1989, aims to combat vehicular emissions and improve air quality across the Valley of Mexico. The current regulations stipulate which vehicles are restricted from circulating on this day, with parameters based on the type of verification hologram and the vehicle's license plate.
For February 27, the restrictions apply from 5:00 AM to 10:00 PM, encompassing private vehicles with verification hologram 2, and certain vehicles with hologram 1 ending with specific digits. Vehicles without verification holograms—such as old or newly delivered cars—also fall under these restrictions. Significant penalties await drivers who disobey these regulations, ranging from fines of 2,074.8 pesos to 3,112.2 pesos.
The decision to implement the "Doble Hoy No Circula" program came as unfavorable atmospheric conditions—a high-pressure system over eastern Mexico—caused stagnation, which, combined with intense solar radiation, increased pollution levels significantly.
"The restrictions are meant to reduce pollution and protect public health," stated the CAME spokesperson during the press briefing. Residents are urged to comply with the regulations to avoid penalties, which could include not only fines but also the confiscation of vehicles.
Vehicles exempt from restrictions include electric and hybrid cars, those with ecological licenses, and vehicles accommodating people with disabilities. The program emphasizes the public's role and offers alternative transportation recommendations, including the extensive public transit network within the metropolis.
Beyond the regulations tied to vehicle circulation, the repercussions of high ozone levels extend to recommendations for the general public. Authorities encourage citizens to avoid outdoor activities, including recreational and sporting events, particularly between 1:00 PM and 7:00 PM, when pollution levels peak. This approach aims to mitigate health risks associated with prolonged exposure to harmful pollutants.
Citizens are encouraged to stay informed through the "Aire" app and check official sources regularly for updates on air quality. The public is reminded of their responsibility to adhere to these guidelines, particularly during high-ozone days.
The implementation of stricter measures like the "Doble Hoy No Circula" symbolizes the growing urgency to address air quality issues in Mexico City, where congestion and pollution have long been problematic. Residents are now more than ever aware of how their vehicle usage directly impacts city air quality.
Authorities assure, "Our intent is not just to impose sanctions but to cultivate environmental consciousness among the populace. The well-being of citizens is our top priority, and we aim to create sustainable urban mobility solutions moving forward." The public is encouraged to adopt alternative modes of transportation whenever possible, supporting broader efforts against pollution.
January 2025 proposals indicate possible expansions to the current circulation restrictions, which would include more aggressive patterns to capture pollutants effectively. The municipality is firmly committed to improving air quality standards and enhancing the quality of life for its residents.