CAMe Suspends Ozone Contingency Phase 1 and Double Hoy No Circula in Mexico Valley

Web Editor

April 25, 2025

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Background on CAMe and its Role

The Comisión Ambiental de la Megalópolis (CAMe) is a Mexican environmental commission responsible for monitoring and managing air quality in the greater Mexico City area, known as the Valley of Mexico. Comprising representatives from the environmental authorities of Mexico City and its surrounding states, CAMe plays a crucial role in implementing measures to mitigate air pollution and protect public health.

Suspension of Contingency Measures

On Friday, April 25, CAMe announced the suspension of Phase 1 of the ozone contingency and the Double Hoy No Circula program for Saturday, April 26. The decision was made due to improved meteorological conditions in the Valley of Mexico, as indicated by weather forecast models. The system of high pressure affecting the region is expected to move away, leading to better air quality conditions.

Normal Operation of Hoy No Circula

CAMe emphasized that the Hoy No Circula program will operate normally on Saturday in the Zona Metropolitana del Valle de México (ZMVM), ensuring that traffic restrictions are in place as scheduled.

Recent Contingency Activations

Air Quality Challenges:

  • January 1: Contingency activated for PM2.5 (complex mixture of solid and liquid particles).
  • February 26: Contingency activated for ozone.
  • March 18: Contingency activated for ozone.
  • April 1: Contingency activated for ozone.
  • April 23: Contingency activated for ozone (suspended on April 24).

Impact on Public Health and Environment:

These contingencies are implemented to address high levels of air pollutants, primarily ozone and particulate matter (PM2.5), which pose significant risks to public health. Exposure to these pollutants can lead to respiratory issues, cardiovascular problems, and other health complications. Moreover, poor air quality contributes to climate change by increasing greenhouse gas emissions.

Key Questions and Answers

  1. What is CAMe? The Comisión Ambiental de la Megalópolis (CAMe) is a Mexican environmental commission responsible for monitoring and managing air quality in the greater Mexico City area.
  2. What are contingency measures? Contingency measures, such as the Hoy No Circula program and restrictions on certain activities, are implemented during periods of poor air quality to reduce emissions and protect public health.
  3. Why were contingency measures suspended? Contingency measures were suspended due to improved meteorological conditions, which are expected to lead to better air quality in the Valley of Mexico.
  4. What is the Hoy No Circula program? The Hoy No Circula program restricts vehicle circulation based on license plate numbers, aiming to decrease traffic-related emissions and improve air quality.
  5. How many contingencies have been activated this year? Six contingencies have been activated in the Valley of Mexico this year, primarily due to high levels of ozone and particulate matter.