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#Air Quality

4 EnMonterrey stories on Air Quality in Monterrey and Nuevo León, newest first. Read the coverage and its linked sources.

  1. Energy · Refining · Sep 20, 2026More Than $1.5B Set for Cadereyta Refinery MaintenanceThe PEF 2027 line follows odor reports and an ASEA inspection whose results Nuevo León is still waiting to receive.
  2. Environment · Infrastructure · Sep 19, 2026Nuevo León to Add Two Air-Monitoring StationsThe new fixed stations will cover the southern metro corridor and Valle de las Salinas, taking the network to 17 fixed stations and 19 total monitoring points.
  3. Energy · Environmental monitoring · Sep 5, 2026Pemex and Regulators Reinforce Cadereyta Refinery MonitoringAfter reports of odors across the metro area, Pemex and environmental authorities are increasing inspections while the source remains unconfirmed.
  4. Policy · Air Quality · Aug 10, 2026Nuevo León’s Emissions Inventory Moves Toward August ReleaseThe state says the long-awaited metropolitan emissions inventory is in final adjustments, with a public presentation expected in the coming weeks and implications for industrial operators.