Mexico City air quality and environmental contingency status on November 3, 2026, Digi Mart USA News (Mexico City): The Secretariat of the Environment (Sedema) of Mexico City reports poor air quality with a high health risk for November 3. For this reason, authorities will maintain normal activities without activating an environmental contingency phase in the capital or in the State of Mexico.
Pollution in the Mexico Valley Metropolitan Zone often changes during the day. When pollutant levels rise, authorities apply restriction measures to protect the population.
What to do during poor air quality
According to the Megalopolis Environmental Commission, when a contingency or poor air quality occurs in Mexico City and its metropolitan area, the following is recommended: avoid civic, cultural and recreational activities, as well as outdoor exercise between 1:00 p.m. and 7:00 p.m.
Outdoor activities organized by public or private institutions should be suspended between 1:00 p.m. and 7:00 p.m.
Outdoor, sports, cultural or mass entertainment events scheduled between 1:00 p.m. and 7:00 p.m.
should be postponed. People are also advised not to smoke, especially in enclosed spaces.
How pollution affects health
Data from the National Institute of Public Health indicate that environmental pollution increases cases of respiratory and cardiovascular diseases. Children, older adults and people with chronic conditions face the greatest risk.
Vehicle traffic is the main source of pollutant emissions in the urban area, so authorities apply fixed programs to regulate vehicle circulation.
Which vehicles will not circulate on Tuesday, November 3
The Hoy No Circula program maintains its regular schedule for Tuesday in Mexico City and the State of Mexico. Vehicles that must suspend circulation are cars with hologram 1 and 2 with pink sticker and license plate endings 7 and 8.
When an environmental contingency is activated
The official air quality standard for ozone indicates that 90 parts per billion should not be exceeded for one hour. However, the Megalopolis Environmental Commission sets the start of a contingency when measurements reach 155 points.
At that level, official agencies apply additional traffic restrictions and suspend work in industrial sectors to reduce emissions.
