Overview
- The Environmental Commission of the Megalopolis suspended the Phase 1 ozone contingency at 18:00 on January 9 after winds increased and atmospheric stability decreased, bringing concentrations back within standards.
- The temporary double Hoy No Circula ended and regular restrictions resumed Saturday, with all vehicles allowed to circulate on Sunday under the standard program.
- Authorities reported 341 sanctions during the episode, including 325 for circulating during restricted periods, one for missing verification, and 15 for visible excessive emissions, with 258 plates removed from out-of-state vehicles as a precautionary measure.
- The alert was activated January 8 after the Cuajimalpa monitoring station registered a peak of 160 ppb of ozone at 16:00.
- Forecasts indicate the high-pressure system is moving away and dispersion should improve, and officials urged the public to consult the Aire app and noted that the Pase Turístico does not grant exemptions during contingencies; typical fines for violations range from 20 to 30 UMAs and vehicles can be towed in CDMX.