The Environmental Commission of the Megalopolis suspended the ozone environmental contingency in Mexico City and the State of Mexico on Friday, January 9, 2026, due to improved air quality. This avoids the Double Hoy No Circula for Saturday, January 10, which will operate normally. Pollutant concentrations decreased thanks to favorable weather conditions.
The Environmental Commission of the Megalopolis (CAMe) announced at 18:00 hours on Friday, January 9, 2026, the suspension of the atmospheric ozone environmental contingency in the Metropolitan Area of the Valley of Mexico, covering Mexico City (CDMX) and the State of Mexico (Edomex). The decision followed a continuous decrease in ozone levels, driven by reduced atmospheric stability and stronger winds starting from 16:00 hours. "Due to the evolution of meteorological conditions in the Valley of Mexico improving through decreased atmospheric stability and increased wind from 16:00 hours, which helped reduce ozone levels continuously, recording hourly concentrations within norms at 18:00 hours," reported the CAMe.
Up to 17:00 hours, only two monitoring stations—Iztapalapa and Nezahualcóyotl—reported poor air quality due to PM10 particles, while most stations showed good or acceptable conditions. The contingency had been activated on Thursday, January 8, due to high pollution levels, but forecasts indicate a high-pressure system will move away on Saturday, enhancing pollutant dispersion.
As a result, the Saturday Hoy No Circula program on January 10 will apply standard restrictions from 5:00 to 22:00 hours. Vehicles with hologram 1 and even plate endings (0, 2, 4, 6, 8), holograms 2 (regardless of digit), and out-of-state vehicles from 5:00 to 11:00 hours will not circulate. In contrast, hologram 1 with odd endings (1, 3, 5, 7, 9), holograms 00 and 0, as well as electric and hybrid vehicles, are exempt.
This suspension eases the burden on drivers, though authorities emphasize the need for public transport to curb pollution in a region prone to winter alerts from cold and stagnant air.
