Contingency Lifted: Hoy No Circula Restrictions Reimposed

The Environmental Commission of the Megalopolis (CAMe) has officially lifted the atmospheric environmental contingency for ozone that has impacted the Metropolitan Zone of the Valley of Mexico (ZMVM) since March 18, 2025. This announcement, made on March 20, 2025, brings relief to residents who have navigated stricter vehicle regulations over the past few days.

Starting from 5:00 a.m. until 10:00 p.m. on March 20, the usual 'Hoy No Circula' program will be back in effect, though with specific restrictions for some vehicles. Vehicles with green stickers, along with those bearing plate numbers ending in 1 and 2, and those with holograms 1 and 2, will be banned from circulating on this day. The program aims to reduce air pollution levels and improve overall air quality in the megacity—which spans across multiple states.

The 'Hoy No Circula' initiative is not just limited to Mexico City; it extends throughout the State of Mexico, affecting numerous municipalities. Similar restrictions apply in municipalities like Atizapán de Zaragoza, Coacalco, Ecatepec, and Naucalpan, taking into account the significant issue of vehicular pollution affecting public health in the region. Motorcycles, public transport vehicles, and hybrid cars are exempt from these restrictions, ensuring essential services and clean energy options remain operational.

The measures enacted by CAMe, though temporarily restrictive, have a clear purpose: protecting the public from the harmful effects of air pollution, particularly during periods when ozone levels reach alarming heights. For those breaching the regulations, fines ranging from 2,262.80 to 3,394.20 pesos will be imposed, demonstrating the seriousness of compliance for residents.

While the restriction may seem harsh, it is vital to note that these measures can make a considerable difference in the long run. Public health experts have consistently linked poor air quality to health problems, ranging from respiratory issues to exacerbated cardiovascular diseases. Considering the densely populated nature of ZMVM, maintaining a keen eye on air quality is essential for the community's well-being.

The initiative is critical in a metropolitan area that encompasses not just Mexico City but also six surrounding states: Hidalgo, Morelos, Puebla, Tlaxcala, and Querétaro. Each of these regions has its own challenges concerning air quality, yet they all contribute to the overall pollution levels in the megalopolis.

The lifted contingency comes as a strategic relief for both residents and local businesses that heavily rely on mobility for commerce. Businesses in the affected areas have faced loss due to the restrictions of previous days, which limited operational hours and customer accessibility.

As the community adapts once more, it’s crucial for residents to stay informed. To avoid fines and ensure compliance with the 'Hoy No Circula' program, it is advised that drivers check the restriction details for their vehicles before setting out. Vehicles exempt from restrictions include those with holograms 0 and 00, as well as electric vehicles and bicycles.

Authorities emphasize that observance of these regulations not only minimizes health risks but also contributes to a longer-term strategy for cleaner air in the region. Every small effort—such as avoiding driving on high-pollution days—plays a part in fostering healthier air quality for future generations.

In the face of ongoing environmental challenges, community engagement and compliance with public safety regulations will play an essential role in ensuring that the metropolitan area has a sustainable future with improved air quality.