Overview
- Federal, Mexico City and State of Mexico officials, who met Tuesday with the Megalopolis Environmental Commission, held a technical session to assess worsening air in the Valley of Mexico and possible responses.
- Authorities said pollutant levels have climbed since January 2026, with five environmental contingencies so far, and warned the ozone season could stretch into late June if rains arrive late.
- Options now on the table include updating Hoy No Circula, the license-plate based driving ban, and the contingency rules that restrict activity on high-smog days.
- The package also covers tougher vehicle checks, uniform gasoline standards, steps to cut LP gas leaks, limits on pasture burning, new motorcycle rules, reforestation and public health advisories during ozone spikes.
- Semarnat requested a compiled list for technical vetting before any rollout, a step that could shape daily travel for more than 22 million residents as large transit upgrades like Mexibús electrification and the Mexicable expansion advance.